[PATCH 2/2] dmaengine: qcom_hidma: fix handoff FIFO memory leak on driver removal

[Qasim Ijaz]

hidma_ll_init() allocates a handoff FIFO, but the matching 
hidma_ll_uninit() function (which is invoked in remove()) 
never releases it, leaking memory.

To fix this call kfifo_free in hidma_ll_uninit().

Fixes: d1615ca2e085 ("dmaengine: qcom_hidma: implement lower level hardware interface")
Cc: stable at vger.kernel.org
Signed-off-by: Qasim Ijaz <qasdev00 at gmail.com>

---
 drivers/dma/qcom/hidma_ll.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c
index fee448499777..0c2bae46746c 100644
--- a/drivers/dma/qcom/hidma_ll.c
+++ b/drivers/dma/qcom/hidma_ll.c
@@ -816,6 +816,7 @@ int hidma_ll_uninit(struct hidma_lldev *lldev)
 
 	required_bytes = sizeof(struct hidma_tre) * lldev->nr_tres;
 	tasklet_kill(&lldev->task);
+	kfifo_free(&lldev->handoff_fifo);
 	memset(lldev->trepool, 0, required_bytes);
 	lldev->trepool = NULL;
 	atomic_set(&lldev->pending_tre_count, 0);
-- 
2.39.5