dmaengine: nbpfaxi: fix a theoretical race

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A race possibility exists if a DMA slave driver tries to free channel
resources witout waiting for all transfers to complete and without
explicitly terminating all requests. In such a case the IRQ processing
thread can race with .device_free_chan_resources(). To fix this race empty
all descriptor lists before freeing descriptor cache.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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Guennadi Liakhovetski 2014-08-03 19:13:03 +02:00 • committed by Vinod Koul

parent b45b262cef

commit 67b1668470

1 changed files with 1 additions and 0 deletions

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drivers/dma/nbpfaxi.c

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