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

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commit 36d5d22090d13fd3a7a8c9663a711cbe6970aac8 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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Dan Carpenter 2020-02-17 17:40:50 +03:00 • committed by Greg Kroah-Hartman
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.