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dmaengine: tegra-apb: Prevent race conditions on channel's freeing
authorDmitry Osipenko <digetx@gmail.com>
Sun, 9 Feb 2020 16:33:41 +0000 (19:33 +0300)
committerVinod Koul <vkoul@kernel.org>
Tue, 25 Feb 2020 06:27:33 +0000 (11:57 +0530)
commit8e84172e372bdca20c305d92d51d33640d2da431
tree317f912be4d5f32db31b794d1e312ab67d2e6782tree | snapshot
parentdda5e35a771043bb5a9e6107fa9f141d8d56b847commit | diff
dmaengine: tegra-apb: Prevent race conditions on channel's freeing

It's incorrect to check the channel's "busy" state without taking a lock.
That shouldn't cause any real troubles, nevertheless it's always better
not to have any race conditions in the code.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://lore.kernel.org/r/20200209163356.6439-5-digetx@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
drivers/dma/tegra20-apb-dma.c diff | blob | history
Domain: System / Kernel;