From: Jaroslav Kysela <perex@perex.cz>
Date: Wed, 27 Jan 2010 17:10:13 +0000 (+0100)
Subject: ALSA: pcm_native - fix runtime->boundary calculation
X-Git-Tag: v2.6.34-rc1~243^2~2^2~20
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7910b4a1db63fefc3d291853d33c34c5b6352e8e;p=pandora-kernel.git

ALSA: pcm_native - fix runtime->boundary calculation

The code in pcm_lib updating runtime->hw_ptr_interrupt expects
that runtime->boundary is divisible with runtime->period_size.
Thanks are going to Clemens Ladisch for the notice.

Fix the runtime->boundary calculation using buffer_size * period_size
as base and find a least common multiple for 32bit platforms when
the expression might overflow.

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
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