From: Lothar Waßmann <LW@KARO-electronics.de>
Date: Tue, 13 Aug 2013 23:00:56 +0000 (-0700)
Subject: drivers/rtc/rtc-stmp3xxx.c: provide timeout for potentially endless loop polling... 
X-Git-Tag: v3.11-rc6~13^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=28a0c88312973792f439493d801ceac61baae9b3;p=pandora-kernel.git

drivers/rtc/rtc-stmp3xxx.c: provide timeout for potentially endless loop polling a HW bit

It's always a bad idea to poll on HW bits without a timeout.

The i.MX28 RTC can be easily brought into a state in which the RTC is
not running (until after a power-on-reset) and thus the status bits
which are polled in the driver won't ever change.

This patch prevents the kernel from getting stuck in this case.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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