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dmaengine: coh901318: Fix a double lock bug in dma_tc_handle() 

commit 36d5d22090 upstream.

The caller is already holding the lock so this will deadlock.

Fixes: 0b58828c92 ("DMAENGINE: COH 901 318 remove irq counting")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200217144050.3i4ymbytogod4ijn@kili.mountain
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Dan Carpenter 2020-02-17 17:40:50 +03:00 committed by Greg Kroah-Hartman
parent 08d67499d2
commit 5293e17978
1 changed files with 0 additions and 4 deletions
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4
drivers/dma/coh901318.c
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@ -1947,8 +1947,6 @@ 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
@ -1969,8 +1967,6 @@ 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.