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ASoC: wm_adsp: Avoid narrow race condition on compr pointer
authorCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
Fri, 19 Feb 2016 14:44:41 +0000 (14:44 +0000)
committerMark Brown <broonie@kernel.org>
Sat, 20 Feb 2016 18:08:19 +0000 (03:08 +0900)
commitc7dae7c4c60693286298e300b3d140c8cff46daa
tree276a4911fa5106e5ebdb9f0916b5a7db6cc6032dtree | snapshot
parentda2b33589013b4cb3dad163f50fae060896cb8b6commit | diff
ASoC: wm_adsp: Avoid narrow race condition on compr pointer

There is a very small window between then wm_adsp_compr_free gets call
and when the DSP is actually powered down. If we get an IRQ from the DSP
in this window then the wm_adsp_compr pointer will be NULL. This patch
adds a check for this into the IRQ handler to avoid any issues when this
happens.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
sound/soc/codecs/wm_adsp.c diff | blob | history
Domain: System / Kernel;