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(parent: 3c4fbe5) | patch
rtc: fix deadlock
authorIngo Molnar <mingo@elte.hu>
Sat, 23 Aug 2008 15:59:07 +0000 (17:59 +0200)
committerIngo Molnar <mingo@elte.hu>
Sat, 23 Aug 2008 16:02:18 +0000 (18:02 +0200)
commit38c052f8cff1bd323ccfa968136a9556652ee420
tree6cee3c0384438e13f065d196195a5d46a3941e4btree | snapshot (tar.gz zip)
parent3c4fbe5e01d7e5309be5045e7ae0db20a049e6dccommit | diff
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>
include/asm-generic/rtc.h diff | blob | blame | history
kernel source for telekom puls (alcatel/mediatek)