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aoe: only install new AoE device once

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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>
This commit is contained in:
Ed L. Cashin 2008-02-08 04:20:06 -08:00 committed by Linus Torvalds
parent 9bb237b6a6
commit 6b9699bbd2
1 changed files with 2 additions and 0 deletions
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2
drivers/block/aoe/aoecmd.c
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@ -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;