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* solos-pci: Fix race condition in tasklet RX handlingDavid Woodhouse2010-08-071-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We were seeing faults in the solos-pci receive tasklet when packets arrived for a VCC which was currently being closed: [18842.727906] EIP: [<e082f490>] br2684_push+0x19/0x234 [br2684] SS:ESP 0068:dfb89d14 [18845.090712] [<c13ecff3>] ? do_page_fault+0x0/0x2e1 [18845.120042] [<e082f490>] ? br2684_push+0x19/0x234 [br2684] [18845.153530] [<e084fa13>] solos_bh+0x28b/0x7c8 [solos_pci] [18845.186488] [<e084f711>] ? solos_irq+0x2d/0x51 [solos_pci] [18845.219960] [<c100387b>] ? handle_irq+0x3b/0x48 [18845.247732] [<c10265cb>] ? irq_exit+0x34/0x57 [18845.274437] [<c1025720>] tasklet_action+0x42/0x69 [18845.303247] [<c102643f>] __do_softirq+0x8e/0x129 [18845.331540] [<c10264ff>] do_softirq+0x25/0x2a [18845.358274] [<c102664c>] _local_bh_enable_ip+0x5e/0x6a [18845.389677] [<c102666d>] local_bh_enable+0xb/0xe [18845.417944] [<e08490a8>] ppp_unregister_channel+0x32/0xbb [ppp_generic] [18845.458193] [<e08731ad>] pppox_unbind_sock+0x18/0x1f [pppox] This patch uses an RCU-inspired approach to fix it. In the RX tasklet's find_vcc() function we first refuse to use a VCC which already has the ATM_VF_READY bit cleared. And in the VCC close function, we synchronise with the tasklet to ensure that it can't still be using the VCC before we continue and allow the VCC to be destroyed. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Tested-by: Nathan Williams <nathan@traverse.com.au> Cc: stable@kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
* atm/solos-pci: call atm_dev_signal_change() when signal changes.Karl Hiramoto2010-07-091-3/+3
| | | | | | | | Propagate changes to upper atm layer, so userspace netmontor knows when DSL showtime reached. Signed-off-by: Karl Hiramoto <karl@hiramoto.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* drivers/atm/solos-pci.c: fix warning/bug, clean up codeAndrew Morton2009-11-181-13/+16
| | | | | | | | | | | | | drivers/atm/solos-pci.c: In function 'flash_upgrade': drivers/atm/solos-pci.c:528: warning: 'fw_name' may be used uninitialized in this function Cc: Chas Williams <chas@cmf.nrl.navy.mil> Cc: David Woodhouse <David.Woodhouse@intel.com> Cc: Nathan Williams <nathan@traverse.com.au> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-By: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* solos-pci: declare MODULE_FIRMWAREBen Hutchings2009-11-101-0/+3
| | | | | Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of git://git.infradead.org/users/dwmw2/solos-2.6David S. Miller2009-09-221-9/+66
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| * solos: Check for rogue received packetsNathan Williams2009-03-251-0/+4
| | | | | | | | | | | | | | | | | | Sometimes there can be received packets with the size field set to 0xFFFF. This seems to only occur after an FPGA or firmware upgrade. This patch discards packets with an invalid size. Signed-off-by: Nathan Williams <nathan@traverse.com.au> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: support new FPGA RAM layoutNathan Williams2009-03-251-9/+62
| | | | | | | | | | | | | | | | | | Buffer sizes have been changed to 2048 bytes. Flash upgrades use a dedicated RAM block. Add support for daughterboard. Signed-off-by: Nathan Williams <nathan@traverse.com.au> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | drivers/atm: Correct redundant testJulia Lawall2009-07-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | str has already been tested. It seems that this test should be on the recently returned value snr. A simplified version of the semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; expression E; @@ if (x == NULL || ...) { ... when forall return ...; } ... when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\) ( *x == NULL | *x != NULL ) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Replace all DMA_nBIT_MASK macro with DMA_BIT_MASK(n)Yang Hongyang2009-04-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the second go through of the old DMA_nBIT_MASK macro,and there're not so many of them left,so I put them into one patch.I hope this is the last round. After this the definition of the old DMA_nBIT_MASK macro could be removed. Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Tony Lindgren <tony@atomide.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Greg KH <greg@kroah.com> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'master' of git://git.infradead.org/~dwmw2/solos-2.6David S. Miller2009-03-211-160/+664
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| * solos: Disable DMA until we have an FPGA update with it actually implemented.David Woodhouse2009-03-171-1/+1
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Automatically determine number of portsNathan Williams2009-03-171-1/+2
| | | | | | | | | | Signed-off-by: Nathan Williams <nathan@traverse.com.au> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Reset device on unload, free pending skbsDavid Woodhouse2009-03-171-1/+29
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Swap upstream/downstream rates in status packet, clean up some moreDavid Woodhouse2009-01-301-26/+25
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Set RX empty flag at startup only for !dma modeDavid Woodhouse2009-01-301-2/+4
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Don't clear config registers at startupDavid Woodhouse2009-01-301-5/+1
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Tidy up status interrupt handling, cope with 'ERROR' statusDavid Woodhouse2009-01-301-4/+13
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Add 'reset' module parameter to reset the DSL chips on loadDavid Woodhouse2009-01-301-0/+10
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Remove debugging, commented-out test codeDavid Woodhouse2009-01-291-49/+3
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Clean up handling of card->tx_mask a littleDavid Woodhouse2009-01-291-25/+28
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Fix various bugs in status packet handlingDavid Woodhouse2009-01-291-21/+28
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Remove superfluous wait_queue_head_t from struct solos_paramDavid Woodhouse2009-01-291-1/+0
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Remove IRQF_DISABLED, don't frob IRQ enable on the FPGA in solos_irq()David Woodhouse2009-01-291-5/+1
| | | | | | | | | | | | Neither of these are necessary. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Remove unused loopback debug stuffDavid Woodhouse2009-01-291-23/+0
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Tidy up tx_mask handling for ports which need TXDavid Woodhouse2009-01-291-7/+13
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Tidy up DMA handling a little. Still untestedDavid Woodhouse2009-01-291-42/+53
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: First attempt at DMA supportDavid Woodhouse2009-01-281-28/+90
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Remove parameter group from sysfs on ATM dev deregisterDavid Woodhouse2009-01-281-0/+2
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Fix under-allocation of skb size for get/set parametersDavid Woodhouse2009-01-281-2/+2
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Add SNR and Attn to status packet, fix oops on loadDavid Woodhouse2009-01-281-7/+23
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Reject non-AAL5 connections.... for nowDavid Woodhouse2009-01-271-0/+6
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Kill existing connections on link down eventDavid Woodhouse2009-01-271-2/+28
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Handle new line status change packets, hook up to ATM layer infoDavid Woodhouse2009-01-271-1/+92
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Add initial list of parametersDavid Woodhouse2009-01-271-6/+24
| | | | | | | | | | | | | | I don't much like the trick with multiple inclusions of solos-attrlist.c but don't really see a saner way to do it without repeating the list. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Handle attribute show/store in kernel more sanelyDavid Woodhouse2009-01-271-0/+187
| | | | | | | | | | | | | | | | There are still a _lot_ of attributes, but for at least the basic ones we want to be able to get/set them from the kernel. Especially the ones we want to inform the ATM core about (link state, speed). Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Kill global 'opens' count.David Woodhouse2009-01-271-10/+0
| | | | | | | | Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Clean up firmware loading codeDavid Woodhouse2009-01-271-136/+73
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We no longer try to load firmware while the ATM is up and running. However, this means that we _do_ make init_module() wait for it, and it takes a long time for now (since we're using ultra-conservative code in the FPGA for that too). The inner loop which uses swahb32p() was by Simon Farnsworth. Simon has patches which migrate us to request_firmware_nowait(), for which we'll actually need to take down the ATM devices, do the upgrade, then reregister them. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: FPGA and firmware update support.Simon Farnsworth2009-01-271-2/+169
| | | | | | | | | | | | | | | | | | This is just a straight pull in of changes, syncing us up to 0.07 from openadsl.sf.net Signed-off-by: Nathan Williams <nathan@traverse.com.au> Signed-off-by: Simon Farnsworth <simon@farnz.org.uk> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Slight debugging improvementsSimon Farnsworth2009-01-271-1/+2
| | | | | | | | | | | | | | | | | | | | | | Print a message if pskb_expand_head fails. Make atmdebug writable by root, so that you can turn printing of data sent to and received from the card on and off at runtime - useful for tracking corruption. Signed-off-by: Simon Farnsworth <simon@farnz.org.uk> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
| * solos: Fix length header in FPGA transfersDavid Woodhouse2009-01-271-4/+7
| | | | | | | | | | | | | | | | The length field shouldn't ever include the size of the header itself. This fixes the problem that some people were seeing with 1500-byte packets. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | drivers/atm: introduce missing kfreeJulia Lawall2009-02-081-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Error handling code following a kmalloc should free the allocated data. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; statement S; expression E; identifier f,l; position p1,p2; expression *ptr != NULL; @@ ( if ((x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...)) == NULL) S | x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...); ... if (x == NULL) S ) <... when != x when != if (...) { <+...x...+> } x->f = E ...> ( return \(0\|<+...x...+>\|ptr\); | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
* atm: Driver for Solos PCI ADSL2+ card.David Woodhouse2008-12-261-0/+790
This adds basic support for the 'Solos' PCI ADSL2+ cards being developed by Traverse Technologies and Xrio Ltd: http://www.traverse.com.au/productview.php?product_id=116 Signed-off-by: Nathan Williams <nathan@traverse.com.au> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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