From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 10 May 2012 14:11:15 +0000 (+0200)
Subject: ALSA: hda - Fix concurrent hash accesses
X-Git-Tag: v3.5-rc1~83^2~4^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3b6bcc292da80ea08a979af177538ffdbbae36b;p=pandora-kernel.git

ALSA: hda - Fix concurrent hash accesses

The amp and caps hashes aren't protected properly for concurrent
accesses.  Protect them via a new mutex now.

But it can't be so simple as originally thought: since the update of a
hash table entry itself might trigger the power-up sequence which
again accesses the hash table, we can't cover the whole function
simply via mutex.  Thus the update part has to be split from the mutex
and revalidated.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

Reading git-diff-tree failed