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authorStefan Richter <stefanr@s5r6.in-berlin.de>2006-07-03 00:58:01 +0200
committerBen Collins <bcollins@ubuntu.com>2006-07-03 00:03:59 -0400
commitd7530a1e767b562c7e071f559d542c132d85fff7 (patch)
treef607e05022d084fd50ea44f794f33edc49fc14ed /drivers/ieee1394/nodemgr.c
parent29454dde27d8e340bb1987bad9aa504af7081eba (diff)
downloadblackbird-op-linux-d7530a1e767b562c7e071f559d542c132d85fff7.tar.gz
blackbird-op-linux-d7530a1e767b562c7e071f559d542c132d85fff7.zip
[PATCH] ieee1394: fix cosmetic problem in speed probe
If ieee1394.h::IEEE1394_SPEED_MAX is bigger than the actual speed of an 1394b host adapter and the speed to another 1394b node was probed, a bigger speed than actually used was kept in host->speed[n]. The only resulting problem so far was sbp2 displaying bogus values in the syslog, e.g. S3200 for actual S800 connections if IEEE1394_SPEED_MAX was S3200. But other high-level drivers which access this field could get into more trouble. (Eth1394 is the only other in-tree driver which does so. It seems it is not affected.) Nodemgr now clips this value according to the host adapter's link speed. A pointer expression in nodemgr_check_speed is also changed for clarity. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Ben Collins <bcollins@ubuntu.com>
Diffstat (limited to 'drivers/ieee1394/nodemgr.c')
-rw-r--r--drivers/ieee1394/nodemgr.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index d541b508a159..dfed2ed2ed99 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -71,7 +71,7 @@ static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
u8 i, *speed, old_speed, good_speed;
int ret;
- speed = ci->host->speed + NODEID_TO_NODE(ci->nodeid);
+ speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
old_speed = *speed;
good_speed = IEEE1394_SPEED_MAX + 1;
@@ -1251,6 +1251,7 @@ static void nodemgr_node_scan_one(struct host_info *hi,
octlet_t guid;
struct csr1212_csr *csr;
struct nodemgr_csr_info *ci;
+ u8 *speed;
ci = kmalloc(sizeof(*ci), GFP_KERNEL);
if (!ci)
@@ -1259,8 +1260,12 @@ static void nodemgr_node_scan_one(struct host_info *hi,
ci->host = host;
ci->nodeid = nodeid;
ci->generation = generation;
- ci->speed_unverified =
- host->speed[NODEID_TO_NODE(nodeid)] > IEEE1394_SPEED_100;
+
+ /* Prepare for speed probe which occurs when reading the ROM */
+ speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
+ if (*speed > host->csr.lnk_spd)
+ *speed = host->csr.lnk_spd;
+ ci->speed_unverified = *speed > IEEE1394_SPEED_100;
/* We need to detect when the ConfigROM's generation has changed,
* so we only update the node's info when it needs to be. */
@@ -1300,8 +1305,6 @@ static void nodemgr_node_scan_one(struct host_info *hi,
nodemgr_create_node(guid, csr, hi, nodeid, generation);
else
nodemgr_update_node(ne, csr, hi, nodeid, generation);
-
- return;
}
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