linux-kernel - [PATCH 2.6.19-rc3] (1/2) fix bd_claim_by

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Message-ID: <45466D61.5070701@ce.jp.nec.com>
Date:	Mon, 30 Oct 2006 16:23:45 -0500
From:	"Jun'ichi Nomura" <j-nomura@...jp.nec.com>
To:	torvalds@...l.org, akpm@...l.org, rdunlap@...otime.net,
	mst@...lanox.co.il, linux-kernel@...r.kernel.org
CC:	bunk@...sta.de, pavel@...e.cz, len.brown@...el.com,
	linux-acpi@...r.kernel.org, linux-pm@...l.org, martin@...enz.eu.org
Subject: [PATCH 2.6.19-rc3] (1/2) fix bd_claim_by_kobject error handling

Hi,

Excuse me for the long Cc list.
I kept people in the thread below in Cc.
http://marc.theaimsgroup.com/?l=linux-kernel&m=116221664710826&w=2

The patch below fixes bd_claim_by_kobject to release bdev correctly
in case that bd_claim succeeds but following add_bd_holder fails.

If it happens, the caller takes it didn't bd_claim() where actually
it did. The bdev becomes no longer bd_claim-able from others.
I don't have any reproducible test case for it but it's a bug.
The bug is introduced in 2.6.18-rc1-mm2 and now in 2.6.19-rc3.

Please consider to apply.

Thanks,
-- 
Jun'ichi Nomura, NEC Corporation of America

View attachment "fix-bd_claim_by_kobject-error-handling.patch" of type "text/x-patch" (733 bytes)