From: Dmitry Osipenko <dig...@gmail.com> [ Upstream commit 8e84172e372bdca20c305d92d51d33640d2da431 ]
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 <dig...@gmail.com> Acked-by: Jon Hunter <jonath...@nvidia.com> Link: https://lore.kernel.org/r/20200209163356.6439-5-dig...@gmail.com Signed-off-by: Vinod Koul <vk...@kernel.org> Signed-off-by: Sasha Levin <sas...@kernel.org> --- drivers/dma/tegra20-apb-dma.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c index 3402494cadf99..78e098b4bd89e 100644 --- a/drivers/dma/tegra20-apb-dma.c +++ b/drivers/dma/tegra20-apb-dma.c @@ -1208,8 +1208,7 @@ static void tegra_dma_free_chan_resources(struct dma_chan *dc) dev_dbg(tdc2dev(tdc), "Freeing channel %d\n", tdc->id); - if (tdc->busy) - tegra_dma_terminate_all(dc); + tegra_dma_terminate_all(dc); spin_lock_irqsave(&tdc->lock, flags); list_splice_init(&tdc->pending_sg_req, &sg_req_list); -- 2.25.1
