From: Dmitry Osipenko Date: Sun, 9 Feb 2020 16:33:41 +0000 (+0300) Subject: dmaengine: tegra-apb: Prevent race conditions on channel's freeing X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8e84172e372bdca20c305d92d51d33640d2da431;p=linux.git 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 Acked-by: Jon Hunter Link: https://lore.kernel.org/r/20200209163356.6439-5-digetx@gmail.com Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c index b18cbfbab0040..81a2b5f4181fb 100644 --- a/drivers/dma/tegra20-apb-dma.c +++ b/drivers/dma/tegra20-apb-dma.c @@ -1298,8 +1298,7 @@ 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);