From 92627da9f73a25ef04ba4b4e95413ea943f1109b Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 17 Feb 2020 17:40:50 +0300 Subject: [PATCH] dmaengine: coh901318: Fix a double lock bug in dma_tc_handle() commit 36d5d22090d13fd3a7a8c9663a711cbe6970aac8 upstream. The caller is already holding the lock so this will deadlock. Fixes: 0b58828c923e ("DMAENGINE: COH 901 318 remove irq counting") Signed-off-by: Dan Carpenter Link: https://lore.kernel.org/r/20200217144050.3i4ymbytogod4ijn@kili.mountain Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/coh901318.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c index 4746fee4cd48..546a91186de1 100644 --- a/drivers/dma/coh901318.c +++ b/drivers/dma/coh901318.c @@ -1960,8 +1960,6 @@ static void dma_tc_handle(struct coh901318_chan *cohc) return; } - spin_lock(&cohc->lock); - /* * When we reach this point, at least one queue item * should have been moved over from cohc->queue to @@ -1982,8 +1980,6 @@ static void dma_tc_handle(struct coh901318_chan *cohc) if (coh901318_queue_start(cohc) == NULL) cohc->busy = 0; - spin_unlock(&cohc->lock); - /* * This tasklet will remove items from cohc->active * and thus terminates them.