Blackfin: fix deadlock in SMP IPI handler

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When a low priority interrupt (like ethernet) is triggered between 2 high
priority IPI messages, a deadlock in disable_irq() is hit by the second
IPI handler.  This is because the second IPI message is queued within the
first IPI handler, but the handler doesn't process all messages, and new
ones are inserted rather than appended.  So now we process all the pending
messages, and append new ones to the pending list.

URL: http://blackfin.uclinux.org/gf/tracker/5226
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

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Sonic Zhang 2009-06-10 08:42:41 +00:00 • committed by Mike Frysinger

parent f9ee3ab81c

commit 86f2008bf5

1 changed files with 7 additions and 6 deletions

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arch/blackfin/mach-common/smp.c

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