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 <dan.carpenter@xxxxxxxxxx>
---
This is the second double lock bug found using static analysis. The
previous one was commit 627469e4445b ("dmaengine: coh901318: Fix a
double-lock bug").
The fact that this has been broken for ten years suggests that no one
has the hardware.
drivers/dma/coh901318.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index e51d836afcc7..1092d4ce723e 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -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.
--
2.11.0
