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authorEd L. Cashin <ecashin@coraid.com>2008-02-08 04:20:06 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:32 -0800
commit6b9699bbd24e82d2ec3bb5a43100099a936ded04 (patch)
treedc36d8716cc502aaac7e6159ffc1a307a4c5302d /drivers/block
parent9bb237b6a670fa7a6af3adc65231b1f6fda44510 (diff)
downloadlinux-6b9699bbd24e82d2ec3bb5a43100099a936ded04.tar.bz2
aoe: only install new AoE device once
An aoe driver user who had about 70 AoE targets found that he was hitting a BUG in sysfs_create_file because the aoe driver was trying to tell the kernel about an AoE device more than once. Each AoE device was reachable by several local network interfaces, and multiple ATA device indentify responses were returning from that single device. This patch eliminates a race condition so that aoe always informs the block layer of a new AoE device once in the presence of multiple incoming ATA device identify responses. Signed-off-by: Ed L. Cashin <ecashin@coraid.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/aoe/aoecmd.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index b49e06ef121e..7a9618313ea3 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -698,6 +698,8 @@ ataid_complete(struct aoedev *d, struct aoetgt *t, unsigned char *id)
d->fw_ver, (long long)ssize);
d->ssize = ssize;
d->geo.start = 0;
+ if (d->flags & (DEVFL_GDALLOC|DEVFL_NEWSIZE))
+ return;
if (d->gd != NULL) {
d->gd->capacity = ssize;
d->flags |= DEVFL_NEWSIZE;