From: Ingo Molnar <mingo@elte.hu>
Date: Sat, 23 Aug 2008 15:59:07 +0000 (+0200)
Subject: rtc: fix deadlock
X-Git-Tag: v2.6.27-rc5~33^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=38c052f8cff1bd323ccfa968136a9556652ee420;p=pandora-kernel.git

rtc: fix deadlock

if get_rtc_time() is _ever_ called with IRQs off, we deadlock badly
in it, waiting for jiffies to increment.

So make the code more robust by doing an explicit mdelay(20).

This solves a very hard to reproduce/debug hard lockup reported
by Mikael Pettersson.

Reported-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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