mmc: sh-mmcif: fix a race, causing an Oops on SMP

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Oopses have been observed on SMP in the sh-mmcif IRQ thread, when the two
IRQ threads run simultaneously on two CPUs. Also take care to guard the
timeout work and the DMA completion callback from possible NULL-pointer
dereferences and races.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

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Guennadi Liakhovetski 2012-12-12 15:38:14 +01:00 • committed by Chris Ball

parent 3050197d55

commit f20bec813e

1 changed files with 36 additions and 3 deletions

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39

drivers/mmc/host/sh_mmcif.c

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