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Subject[PATCH v3 12/12] dma: edma: Return if nothing left todo in edma_execute
Date
It is possible edma_execute is called even when all the SG
elements have been submitted for transmission, we add a check
for the same and avoid executing the rest of the function.

Signed-off-by: Joel Fernandes <joelf@ti.com>
---
drivers/dma/edma.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
index eca1b47..62987fc 100644
--- a/drivers/dma/edma.c
+++ b/drivers/dma/edma.c
@@ -168,6 +168,9 @@ static void edma_execute(struct edma_chan *echan)
total_left = edesc->pset_nr - edesc->total_processed;
total_link_set = total_left > MAX_NR_LS ? MAX_NR_LS : total_left;

+ if (!total_left)
+ return;
+
/* First time, setup 2 cyclically linked sets, each containing half
the slots allocated for this channel */
if (edesc->total_processed == 0) {
--
1.7.9.5


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