From: NeilBrown <neilb@suse.de>
Date: Tue, 4 Mar 2008 22:29:35 +0000 (-0800)
Subject: md: fix possible raid1/raid10 deadlock on read error during resync
X-Git-Tag: v2.6.25-rc4~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1c830532f6b44d10a1743ccd00e990c6b83396f5;p=pandora-kernel.git

md: fix possible raid1/raid10 deadlock on read error during resync

Thanks to K.Tanaka and the scsi fault injection framework, here is a fix for
another possible deadlock in raid1/raid10 error handing.

If a read request returns an error while a resync is happening and a resync
request is pending, the attempt to fix the error will block until the resync
progresses, and the resync will block until the read request completes.  Thus
a deadlock.

This patch fixes the problem.

Cc: "K.Tanaka" <k-tanaka@ce.jp.nec.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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