| Commit message (Collapse) | Author | Age | Files | Lines |
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After the latest changes to the socket/port layer the existence of
the functions tipc_port_init() and tipc_port_destroy() cannot be
justified. They are both called only once, from tipc_sk_create() and
tipc_sk_delete() respectively, and their functionality can better be
merged into the latter two functions.
This also entails that all remaining references to port_lock now are
made from inside socket.c, something that will make it easier to remove
this lock.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The function tipc_acknowledge() is a remnant from the obsolete native
API. Currently, it grabs port_lock, before building an acknowledge
message and sending it to the peer.
Since all access to socket members now is protected by the socket lock,
it has become unnecessary to grab port_lock here.
In this commit, we remove the usage of port_lock, simplify the
function, and move it to socket.c, renaming it to tipc_sk_send_ack().
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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tipc_port_connect()/tipc_port_disconnect() are remnants of the obsolete
native API. Their only task is to grab port_lock and call the functions
__tipc_port_connect()/__tipc_port_disconnect() respectively, which will
perform the actual state change.
Since socket/port exection now is single-threaded the use of port_lock
is not needed any more, so we can safely replace the two functions with
their lock-free counterparts.
In this commit, we remove the two functions. Furthermore, the contents
of __tipc_port_disconnect() is so trivial that we choose to eliminate
that function too, expanding its functionality into tipc_shutdown().
__tipc_port_connect() is simplified, moved to socket.c, and given the
more correct name tipc_sk_finish_conn(). Finally, we eliminate the
function auto_connect(), and expand its contents into filter_connect().
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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tipc_port_shutdown() is a remnant from the now obsolete native
interface. As such it grabs port_lock in order to protect itself
from concurrent BH processing.
However, after the recent changes to the port/socket upcalls, sockets
are now basically single-threaded, and all execution, except the read-only
tipc_sk_timer(), is executing within the protection of lock_sock(). So
the use of port_lock is not needed here.
In this commit we eliminate the whole function, and merge it into its
only caller, tipc_shutdown().
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The last remaining BH upcall to the socket, apart for the message
reception function tipc_sk_rcv(), is the timer function.
We prefer to let this function continue executing in BH, since it only
does read-acces to semi-permanent data, but we make three changes to it:
1) We introduce a bh_lock_sock()/bh_unlock_sock() inside the scope
of port_lock. This is a preparation for replacing port_lock with
bh_lock_sock() at the locations where it is still used.
2) We move the function from port.c to socket.c, as a further step
of eliminating the port code level altogether.
3) We let it make use of the newly introduced tipc_msg_create()
function. This enables us to get rid of three context specific
functions (port_create_self_abort_msg() etc.) in port.c
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In the current implementation, each 'struct tipc_node' instance keeps
a linked list of those ports/sockets that are connected to the node
represented by that struct. The purpose of this is to let the node
object know which sockets to alert when it loses contact with its peer
node, i.e., which sockets need to have their connections aborted.
This entails an unwanted direct reference from the node structure
back to the port/socket structure, and a need to grab port_lock
when we have to make an upcall to the port. We want to get rid of
this unecessary BH entry point into the socket, and also eliminate
its use of port_lock.
In this commit, we instead let the node struct keep list of "connected
socket" structs, which each represents a connected socket, but is
allocated independently by the node at the moment of connection. If
the node loses contact with its peer node, the list is traversed, and
a "connection abort" message is created for each entry in the list. The
message is sent to it respective connected socket using the ordinary
data path, and the receiving socket aborts its connections upon reception
of the message.
This enables us to get rid of the direct reference from 'struct node' to
´struct port', and another unwanted BH access point to the latter.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The current link implementation keeps a linked list of blocked ports/
sockets that is populated when there is link congestion. The purpose
of this is to let the link know which users to wake up when the
congestion abates.
This adds unnecessary complexity to the data structure and the code,
since it forces us to involve the link each time we want to delete
a socket. It also forces us to grab the spinlock port_lock within
the scope of node_lock. We want to get rid of this direct dependence,
as well as the deadlock hazard resulting from the usage of port_lock.
In this commit, we instead let the link keep list of a "wakeup" pseudo
messages for use in such situations. Those messages are sent to the
pending sockets via the ordinary message reception path, and wake up
the socket's owner when they are received.
This enables us to get rid of the 'waiting_ports' linked lists in struct
tipc_port that manifest this direct reference. As a consequence, we can
eliminate another BH entry into the socket, and hence the need to grab
port_lock. This is a further step in our effort to remove port_lock
altogether.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The function tipc_msg_init() has turned out to be of limited value
in many cases. It take too few parameters to be usable for creating
a complete message, it makes too many assumptions about what the
message should be used for, and it does not allocate any buffer to
be returned to the caller.
Therefore, we now introduce the new function tipc_msg_create(), which
takes all the parameters needed to create a full message, and returns
a buffer of the requested size. The new function will be very useful
for the changes we will be doing in later commits in this series.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pulling to get some TIPC fixes that a net-next series depends
upon.
Signed-off-by: David S. Miller <davem@davemloft.net>
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The first initializer in the following
union vxlan_addr ipa = {
.sin.sin_addr.s_addr = tip,
.sa.sa_family = AF_INET,
};
is optimised away by the compiler, due to the second initializer,
therefore initialising .sin.sin_addr.s_addr always to 0.
This results in netlink messages indicating a L3 miss never contain the
missed IP address. This was observed with GCC 4.8 and 4.9. I do not know about previous versions.
The problem affects user space programs relying on an IP address being
sent as part of a netlink message indicating a L3 miss.
Changing
.sa.sa_family = AF_INET,
to
.sin.sin_family = AF_INET,
fixes the problem.
Signed-off-by: Gerhard Stenzel <gerhard.stenzel@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm fix from Thierry Reding:
"Just one bugfix for the PWM lookup table code that would cause a PWM
channel to be set to the wrong period and polarity for non-perfect
matches"
* tag 'pwm/for-3.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: Fix period and polarity in pwm_get() for non-perfect matches
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If pwm_get() finds a look-up entry with a perfect match (both dev_id and
con_id match), the loop is aborted, and "p" still points to the correct
struct pwm_lookup.
If only an entry with a matching dev_id or con_id is found, the loop
terminates after traversing the whole list, and "p" now points to
arbitrary memory, not part of the pwm_lookup list.
Then pwm_set_period() and pwm_set_polarity() will set random values for
period resp. polarity.
To fix this, save period and polarity when finding a new best match,
just like is done for chip (for the provider) and index.
This fixes the LCD backlight on r8a7740/armadillo-legacy, which was fed
period 0 and polarity -1068821144 instead of 33333 resp. 1.
Fixes: 3796ce1d4d4b ("pwm: add period and polarity to struct pwm_lookup")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: stable@vger.kernel.org
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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The new_ctx pointer is set only for non-chanctx drivers. This yielded a
crash for chanctx-based drivers during channel switch finalization:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000020
IP: ieee80211_vif_use_reserved_switch+0x71c/0xb00 [mac80211]
Use an adequate chanctx pointer to fix this.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull networking fixes from David Miller:
"Here are some bug fixes that have piled up during ksummit/linuxcon.
1) Fix endian problems in ibmveth, from Anton Blanchard.
2) IPV6 routing code does GFP_KERNEL allocation in atomic, fix from
Benjamin Block.
3) SCTP association fixes from Daniel Borkmann.
4) When multiple VLAN headers are present we have to make sure the
second and subsequent ones are pullable in the SKB otherwise we
blindly dereference garbage. From Jiri Benc.
5) The argument adjustment of the signature of hlist_add_after*()
introduced a regression in the batman-adv code, fix from Sven
Eckelmann.
6) Fix TX hang handling to avoid a panic in i40e, from Anjali Singhai
Jain.
7) PTP flag test is inverted in i40e driver, from Jesse Brandeburg.
8) ATM LEC driver needs to hold RTNL mutex over MTU changes, from
Chas Williams.
9) Truncate packets larger then the TPACKET_V3 format configured
buffers, otherwise we overwrite past the end of said buffers.
From Eric Dumazet.
10) Fix endianness bugs in qlcnic firmware handling, from Rajesh
Borundia and Shahed Shaikh.
11) CXGB4 sometimes doesn't get all of the TX completion events it
should resulting in SKBs getting stuck in the TX queue, from
Hariprasad Shenai.
12) When the FEC chip's PTP clock is disabled, you can't access the
register. Add necessary checks to avoid the resulting hang, from
Fugang Duan"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (37 commits)
drivers: isdn: eicon: xdi_msg.h: Fix typo in #ifndef
net: sctp: fix suboptimal edge-case on non-active active/retrans path selection
net: sctp: spare unnecessary comparison in sctp_trans_elect_best
net: ethernet: broadcom: bnx2x: Remove redundant #ifdef
ibmveth: Fix endian issues with rx_no_buffer statistic
net: xgene: fix possible NULL dereference in xgene_enet_free_desc_rings()
openvswitch: fix panic with multiple vlan headers
net: ipv6: fib: don't sleep inside atomic lock
net: fec: ptp: avoid register access when ipg clock is disabled
cxgb4: Free completed tx skbs promptly
cxgb4: Fix race condition in cleanup
sctp: not send SCTP_PEER_ADDR_CHANGE notifications with failed probe
bnx2x: Revert UNDI flushing mechanism
qlcnic: Fix endianess issue in firmware load from file operation
qlcnic: Fix endianess issue in FW dump template header
qlcnic: Fix flash access interface to application
MAINTAINERS: Add section for MRF24J40 IEEE 802.15.4 radio driver
macvlan: Allow setting multicast filter on all macvlan types
packet: handle too big packets for PACKET_V3
MAINTAINERS: add entry for ec_bhf driver
...
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Test for definedness of the macro which is actually defined (the
change is hard to see: it is s/SSS/SSA/).
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In SCTP, selection of active (T.ACT) and retransmission (T.RET)
transports is being done whenever transport control operations
(UP, DOWN, PF, ...) are engaged through sctp_assoc_control_transport().
Commits 4c47af4d5eb2 ("net: sctp: rework multihoming retransmission
path selection to rfc4960") and a7288c4dd509 ("net: sctp: improve
sctp_select_active_and_retran_path selection") have both improved
it towards a more fine-grained and optimal path selection.
Currently, the selection algorithm for T.ACT and T.RET is as follows:
1) Elect the two most recently used ACTIVE transports T1, T2 for
T.ACT, T.RET, where T.ACT<-T1 and T1 is most recently used
2) In case primary path T.PRI not in {T1, T2} but ACTIVE, set
T.ACT<-T.PRI and T.RET<-T1
3) If only T1 is ACTIVE from the set, set T.ACT<-T1 and T.RET<-T1
4) If none is ACTIVE, set T.ACT<-best(T.PRI, T.RET, T3) where
T3 is the most recently used (if avail) in PF, set T.RET<-T.PRI
Prior to above commits, 4) was simply a camp on T.ACT<-T.PRI and
T.RET<-T.PRI, ignoring possible paths in PF. Camping on T.PRI is
still slightly suboptimal as it can lead to the following scenario:
Setup:
<A> <B>
T1: p1p1 (10.0.10.10) <==> .'`) <==> p1p1 (10.0.10.12) <= T.PRI
T2: p1p2 (10.0.10.20) <==> (_ . ) <==> p1p2 (10.0.10.22)
net.sctp.rto_min = 1000
net.sctp.path_max_retrans = 2
net.sctp.pf_retrans = 0
net.sctp.hb_interval = 1000
T.PRI is permanently down, T2 is put briefly into PF state (e.g. due to
link flapping). Here, the first time transmission is sent over PF path
T2 as it's the only non-INACTIVE path, but the retransmitted data-chunks
are sent over the INACTIVE path T1 (T.PRI), which is not good.
After the patch, it's choosing better transports in both cases by
modifying step 4):
4) If none is ACTIVE, set T.ACT_new<-best(T.ACT_old, T3) where T3 is
the most recently used (if avail) in PF, set T.RET<-T.ACT_new
This will still select a best possible path in PF if available (which
can also include T.PRI/T.RET), and set both T.ACT/T.RET to it.
In case sctp_assoc_control_transport() *just* put T.ACT_old into INACTIVE
as it transitioned from ACTIVE->PF->INACTIVE and stays in INACTIVE just
for a very short while before going back ACTIVE, it will guarantee that
this path will be reselected for T.ACT/T.RET since T3 (PF) is not
available.
Previously, this was not possible, as we would only select between T.PRI
and T.RET, and a possible T3 would be NULL due to the fact that we have
just transitioned T3 in sctp_assoc_control_transport() from PF->INACTIVE
and would select a suboptimal path when T.PRI/T.RET have worse properties.
In the case that T.ACT_old permanently went to INACTIVE during this
transition and there's no PF path available, plus T.PRI and T.RET are
INACTIVE as well, we would now camp on T.ACT_old, but if everything is
being INACTIVE there's really not much we can do except hoping for a
successful HB to bring one of the transports back up again and, thus
cause a new selection through sctp_assoc_control_transport().
Now both tests work fine:
Case 1:
1. T1 S(ACTIVE) T.ACT
T2 S(ACTIVE) T.RET
2. T1 S(ACTIVE) T.ACT, T.RET
T2 S(PF)
3. T1 S(ACTIVE) T.ACT, T.RET
T2 S(INACTIVE)
5. T1 S(PF) T.ACT, T.RET
T2 S(INACTIVE)
[ 5.1 T1 S(INACTIVE) T.ACT, T.RET
T2 S(INACTIVE) ]
6. T1 S(ACTIVE) T.ACT, T.RET
T2 S(INACTIVE)
7. T1 S(ACTIVE) T.ACT
T2 S(ACTIVE) T.RET
Case 2:
1. T1 S(ACTIVE) T.ACT
T2 S(ACTIVE) T.RET
2. T1 S(PF)
T2 S(ACTIVE) T.ACT, T.RET
3. T1 S(INACTIVE)
T2 S(ACTIVE) T.ACT, T.RET
5. T1 S(INACTIVE)
T2 S(PF) T.ACT, T.RET
[ 5.1 T1 S(INACTIVE)
T2 S(INACTIVE) T.ACT, T.RET ]
6. T1 S(INACTIVE)
T2 S(ACTIVE) T.ACT, T.RET
7. T1 S(ACTIVE) T.ACT
T2 S(ACTIVE) T.RET
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When both transports are the same, we don't have to go down that
road only to realize that we will return the very same transport.
We are guaranteed that curr is always non-NULL. Therefore, just
short-circuit this special case.
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Nothing defines _ASM_GENERIC_INT_L64_H, it is a weird way to check for
64 bit longs, and u64 should be printed using %llx anyway.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Hidden away in the last 8 bytes of the buffer_list page is a solitary
statistic. It needs to be byte swapped or else ethtool -S will
produce numbers that terrify the user.
Since we do this in multiple places, create a helper function with a
comment explaining what is going on.
Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
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A NULL pointer dereference is possible for the argument ring->buf_pool
which is passed to xgene_enet_free_desc_ring(), as ring could be NULL.
And now since NULL pointers are being checked for before the calls to
xgene_enet_free_desc_ring(), might as well take advantage of them and
not call the function if the argument would be NULL.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When there are multiple vlan headers present in a received frame, the first
one is put into vlan_tci and protocol is set to ETH_P_8021Q. Anything in the
skb beyond the VLAN TPID may be still non-linear, including the inner TCI
and ethertype. While ovs_flow_extract takes care of IP and IPv6 headers, it
does nothing with ETH_P_8021Q. Later, if OVS_ACTION_ATTR_POP_VLAN is
executed, __pop_vlan_tci pulls the next vlan header into vlan_tci.
This leads to two things:
1. Part of the resulting ethernet header is in the non-linear part of the
skb. When eth_type_trans is called later as the result of
OVS_ACTION_ATTR_OUTPUT, kernel BUGs in __skb_pull. Also, __pop_vlan_tci
is in fact accessing random data when it reads past the TPID.
2. network_header points into the ethernet header instead of behind it.
mac_len is set to a wrong value (10), too.
Reported-by: Yulong Pei <ypei@redhat.com>
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The function fib6_commit_metrics() allocates a piece of memory in mode
GFP_KERNEL while holding an atomic lock from higher up in the stack, in
the function __ip6_ins_rt(). This produces the following BUG:
> BUG: sleeping function called from invalid context at mm/slub.c:1250
> in_atomic(): 1, irqs_disabled(): 0, pid: 2909, name: dhcpcd
> 2 locks held by dhcpcd/2909:
> #0: (rtnl_mutex){+.+.+.}, at: [<ffffffff81978e67>] rtnl_lock+0x17/0x20
> #1: (&tb->tb6_lock){++--+.}, at: [<ffffffff81a6951a>] ip6_route_add+0x65a/0x800
> CPU: 1 PID: 2909 Comm: dhcpcd Not tainted 3.17.0-rc1 #1
> Hardware name: ASUS All Series/Q87T, BIOS 0216 10/16/2013
> 0000000000000008 ffff8800c8f13858 ffffffff81af135a 0000000000000000
> ffff880212202430 ffff8800c8f13878 ffffffff810f8d3a ffff880212202c98
> 0000000000000010 ffff8800c8f138c8 ffffffff8121ad0e 0000000000000001
> Call Trace:
> [<ffffffff81af135a>] dump_stack+0x4e/0x68
> [<ffffffff810f8d3a>] __might_sleep+0x10a/0x120
> [<ffffffff8121ad0e>] kmem_cache_alloc_trace+0x4e/0x190
> [<ffffffff81a6bcd6>] ? fib6_commit_metrics+0x66/0x110
> [<ffffffff81a6bcd6>] fib6_commit_metrics+0x66/0x110
> [<ffffffff81a6cbf3>] fib6_add+0x883/0xa80
> [<ffffffff81a6951a>] ? ip6_route_add+0x65a/0x800
> [<ffffffff81a69535>] ip6_route_add+0x675/0x800
> [<ffffffff81a68f2a>] ? ip6_route_add+0x6a/0x800
> [<ffffffff81a6990c>] inet6_rtm_newroute+0x5c/0x80
> [<ffffffff8197cf01>] rtnetlink_rcv_msg+0x211/0x260
> [<ffffffff81978e67>] ? rtnl_lock+0x17/0x20
> [<ffffffff81119708>] ? lock_release_holdtime+0x28/0x180
> [<ffffffff81978e67>] ? rtnl_lock+0x17/0x20
> [<ffffffff8197ccf0>] ? __rtnl_unlock+0x20/0x20
> [<ffffffff819a989e>] netlink_rcv_skb+0x6e/0xd0
> [<ffffffff81978ee5>] rtnetlink_rcv+0x25/0x40
> [<ffffffff819a8e59>] netlink_unicast+0xd9/0x180
> [<ffffffff819a9600>] netlink_sendmsg+0x700/0x770
> [<ffffffff81103735>] ? local_clock+0x25/0x30
> [<ffffffff8194e83c>] sock_sendmsg+0x6c/0x90
> [<ffffffff811f98e3>] ? might_fault+0xa3/0xb0
> [<ffffffff8195ca6d>] ? verify_iovec+0x7d/0xf0
> [<ffffffff8194ec3e>] ___sys_sendmsg+0x37e/0x3b0
> [<ffffffff8111ef15>] ? trace_hardirqs_on_caller+0x185/0x220
> [<ffffffff81af979e>] ? mutex_unlock+0xe/0x10
> [<ffffffff819a55ec>] ? netlink_insert+0xbc/0xe0
> [<ffffffff819a65e5>] ? netlink_autobind.isra.30+0x125/0x150
> [<ffffffff819a6520>] ? netlink_autobind.isra.30+0x60/0x150
> [<ffffffff819a84f9>] ? netlink_bind+0x159/0x230
> [<ffffffff811f989a>] ? might_fault+0x5a/0xb0
> [<ffffffff8194f25e>] ? SYSC_bind+0x7e/0xd0
> [<ffffffff8194f8cd>] __sys_sendmsg+0x4d/0x80
> [<ffffffff8194f912>] SyS_sendmsg+0x12/0x20
> [<ffffffff81afc692>] system_call_fastpath+0x16/0x1b
Fixing this by replacing the mode GFP_KERNEL with GFP_ATOMIC.
Signed-off-by: Benjamin Block <bebl@mageta.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The current kernel hang on i.MX6SX with rootfs mount from MMC.
The root cause is that ptp uses a periodic timer to access enet register
even if ipg clock is disabled.
FEC ptp driver start one period timer to read 1588 counter register in the
ptp init function that is called after FEC driver is probed.
To save power, after FEC probe finish, FEC driver disable all clocks including
ipg clock that is needed for register access.
i.MX5x, i.MX6q/dl/sl FEC register access don't cause system hang when ipg clock
is disabled, just return zero value. But for i.MX6sx SOC, it cause system hang.
To avoid the issue, we need to check ptp clock status before ptp timer count access.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Description of problem:
The NIC card is not reporting back to the driver the transmitted skbs,
so they get stuck in the TX ring causing issues with reference
counters in other kernel components.
Developed a new Automatic Egress Queue Update firmware facility to slowly tick
through Egress Queues and send back any outstanding CIDX Updates which are
laying around.
Based on original work by Casey Leedom <leedom@chelsio.com>
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://gitorious.org/linux-can/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2014-08-21
The first patch is from Mirza Krak, it fixes the initialization of the hardware
in the sja1000 driver. The next patch is contributed by Dan Carpenter, it fixes
the error handling in the c_can's probe function. Then there are two patches
for the flexcan driver, one by Alexander Stein, which fixes the resetting of
the bus error interrupt mask, the other one by Sebastian Andrzej Siewior which
adds an additional error state transition message.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Once the CAN-bus is open and a packet is sent, the controller switches
into the PASSIVE state. Once the BUS is closed again it goes the back
err-warning. The TX error counter goes 0 -> 0x80 -> 0x7f.
This patch makes sure that the user learns about this state chang
(CAN_STATE_ERROR_WARNING => CAN_STATE_ERROR_PASSIVE)
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Matthias Klein <matthias.klein@optimeas.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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In case we don't have FLEXCAN_HAS_BROKEN_ERR_STATE and the user set
CAN_CTRLMODE_BERR_REPORTING once it can not be unset again until reboot.
So in case neither hardware nor user wants the error interrupt disable
the bit.
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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devm_ioremap() returns NULL on error, not an ERR_PTR().
Fixes: 33cf75656923 ('can: c_can_platform: Fix raminit, use devm_ioremap() instead of devm_ioremap_resource()')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.11
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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When sja1000 is not compiled as module the SJA1000 chip is only
initialized during device registration on kernel boot. Should the chip
get a hardware reset there is no way to reinitialize it without re-
booting the Linux kernel.
This patch adds a check in sja1000_start if the chip is initialized, if
not we initialize it.
Signed-off-by: Mirza Krak <mirza.krak@hostmobility.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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There is a possible race condition when we unregister the PCI Driver and then
flush/destroy the global "workq". This could lead to situations where there
are tasks on the Work Queue with references to now deleted adapter data
structures. Instead, have per-adapter Work Queues which were instantiated and
torn down in init_one() and remove_one(), respectively.
v2: Remove unnecessary call to flush_workqueue() before destroy_workqueue()
Signed-off-by: Anish Bhatt <anish@chelsio.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since the transport has always been in state SCTP_UNCONFIRMED, it
therefore wasn't active before and hasn't been used before, and it
always has been, so it is unnecessary to bug the user with a
notification.
Reported-by: Deepak Khandelwal <khandelwal.deepak.1987@gmail.com>
Suggested-by: Vlad Yasevich <vyasevich@gmail.com>
Suggested-by: Michael Tuexen <tuexen@fh-muenster.de>
Suggested-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Zhu Yanjun <Yanjun.Zhu@windriver.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 91ebb929b6f8 ("bnx2x: Add support for Multi-Function UNDI") [which was
later supposedly fixed by de682941eef3 ("bnx2x: Fix UNDI driver unload")]
introduced a bug in which in some [yet-to-be-determined] scenarios the
alternative flushing mechanism which was to guarantee the Rx buffers are
empty before resetting them during device probe will fail.
If this happens, when device will be loaded once more a fatal attention will
occur; Since this most likely happens in boot from SAN scenarios, the machine
will fail to load.
Notice this may occur not only in the 'Multi-Function' scenario but in the
regular scenario as well, i.e., this introduced a regression in the driver's
ability to perform boot from SAN.
The patch reverts the mechanism and applies the old scheme to multi-function
devices as well as to single-function devices.
Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Shahed Shaikh says:
====================
qlcnic: Bug fixes
This series fixes some bugs related to endianess.
Please apply this series to net.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Firmware binary file is in little endian. On big-endian architecture, while
writing this binary FW file to adapters memory, writel() swaps the data resulting into
corruption of FW image. So, swap the data before writing into adapters memory.
Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Firmware dump template header is read from adapter using
readl() which swaps the data. So, adjust structure
element on the boundary of 32bit dword.
Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Application expects flash data in little endian, but driver reads/writes
flash data using readl()/writel() APIs which swaps data on big endian machine.
So, swap the data after reading from and before writing to flash memory.
Signed-off-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Alan is the original author of the driver. This change was discussed
with the 802.15.4 subsystem maintainer, Alexander Aring.
Signed-off-by: Alan Ott <alan@signal11.us>
Acked-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently, macvlan code restricts multicast and unicast
filter setting only to passthru devices. As a result,
if a guest using macvtap wants to receive multicast
traffic, it has to set IFF_ALLMULTI or IFF_PROMISC.
This patch makes it possible to use the fdb interface
to add multicast addresses to the filter thus allowing
a guest to receive only targeted multicast traffic.
CC: John Fastabend <john.r.fastabend@intel.com>
CC: Michael S. Tsirkin <mst@redhat.com>
CC: Jason Wang <jasowang@redhat.com>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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af_packet can currently overwrite kernel memory by out of bound
accesses, because it assumed a [new] block can always hold one frame.
This is not generally the case, even if most existing tools do it right.
This patch clamps too long frames as API permits, and issue a one time
error on syslog.
[ 394.357639] tpacket_rcv: packet too big, clamped from 5042 to 3966. macoff=82
In this example, packet header tp_snaplen was set to 3966,
and tp_len was set to 5042 (skb->len)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: f6fb8f100b80 ("af-packet: TPACKET_V3 flexible buffer implementation.")
Acked-by: Daniel Borkmann <dborkman@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Added entry for ec_bhf driver.
Signed-off-by: Dariusz Marcinkiewicz <reksio@newterm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The LECS response contains the MTU that should be used. Correctly
synchronize with other layers when updating.
Signed-off-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Missing semicolon in range check fix.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Vasily Averin says:
====================
cbq: incorrectly low bandwidth blocks limited traffic
v2: patch description changes
Fixes: f0f6ee1f70c4 ("cbq: incorrect processing of high limits")
Mainstream commit f0f6ee1f70c4 ("cbq: incorrect processing of high limits")
have side effect: if cbq bandwidth setting is less than real interface
throughput non-limited traffic can delay limited traffic for a very long time.
This happen because of q->now changes incorrectly in cbq_dequeue():
in described scenario L2T is much greater than real time delay,
and q->now gets an extra boost for each transmitted packet.
Accumulated boost prevents update q->now, and blocked class can wait
very long time until (q->now >= cl->undertime) will be true again.
More detailed problem description can be found here:
http://www.spinics.net/lists/netdev/msg292493.html
Following patches should fix the problem.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now q->now_rt is identical to q->now and is not required anymore.
Signed-off-by: Vasily Averin <vvs@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Mainstream commit f0f6ee1f70c4 ("cbq: incorrect processing of high limits")
have side effect: if cbq bandwidth setting is less than real interface
throughput non-limited traffic can delay limited traffic for a very long time.
This happen because of q->now changes incorrectly in cbq_dequeue():
in described scenario L2T is much greater than real time delay,
and q->now gets an extra boost for each transmitted packet.
Accumulated boost prevents update q->now, and blocked class can wait
very long time until (q->now >= cl->undertime) will be true again.
To fix the problem the patch updates q->now on each cbq_update() call.
L2T-related pre-modification q->now was moved to cbq_update().
My testing confirmed that it fixes the problem and did not discover
any side-effects
Fixes: f0f6ee1f70c4 ("cbq: incorrect processing of high limits")
Signed-off-by: Vasily Averin <vvs@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 3b4f302d8578 ("tipc: eliminate
redundant locking") introduced a bug by removing the sanity check
for message importance, allowing programs to assign any value to
the msg_user field. This will mess up the packet reception logic
and may cause random link resets.
Signed-off-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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On the one hand, phy_device.c provides a generic reset function if the phy
driver does not provide a soft_reset pointer. This generic reset does not take
into account the state of the phy, with a potential failure if the phy is in
powerdown mode. On the other hand, smsc driver provides a function with both
correct reset behaviour and configuration.
This patch moves the reset part into a new smsc_phy_reset function and provides
the soft_reset pointer to have a correct reset behaviour by default.
Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@armadeus.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net
Jeff Kirsher says:
====================
Intel Wired LAN Driver Updates 2014-08-15
This series contains fixes to i40e only.
Anjali provides two fixes for i40e, first adds a check for non-active
VF before sending admin queue messages to the VFS. This resolves a
potential kernel panic which would happen whenever we got a Tx hang and
there were VFS that were not up or enabled. The second fix adds
additional checks so that we do try to access a VF that is not up or
enabled which would dereference a null pointer.
Jesse fixes a i40e PTP bug where the hang detection routine was never
being run when PTP was enabled.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The receive hang detection routine was never being run when
PTP was enabled.
Change-ID: I200f35b0f3190d31b595df89d678f4c8a2131ba0
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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In some functions we might be doing potential dereference
without a check. This patch puts the check in place for all these
functions. Also fix the "for loops" so that we increment VF at the
right place so that we always do it even if we are short-circuiting
the loop through continue.
Change-ID: Id4276cfb1e841031bb7b6d6790c414242f364a9f
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Tested-by: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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