From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 26 Jun 2006 14:26:13 +0000 (+0100)
Subject: [ARM] fix drivers/mfd/ucb1x00-core.c IRQ probing bug
X-Git-Tag: v2.6.18-rc1~595^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cfc736564fd01ee008d746913b1bbb90e3eb1f99;p=pandora-kernel.git

[ARM] fix drivers/mfd/ucb1x00-core.c IRQ probing bug

While reviewing the IRQ autoprobing code i found the attached buglet.
probe_irq_on()/off() calls must always be in pairs, because the generic IRQ
code uses a global semaphore to serialize all autoprobing activites.
(which does make sense) The ARM code's probe_irq_*() implementation does
not do this, but if this driver is ever used on another platform, this bug
might bite.

(It probably does not trigger in practice, because a zero probing mask
returned should be rare - but still.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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