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[v2,4/4] dmaengine: zynqmp_dma: Fix race condition in the probe

Message ID 1512624268-13944-5-git-send-email-appanad@xilinx.com (mailing list archive)
State New, archived
Headers show

Commit Message

Appana Durga Kedareswara rao Dec. 7, 2017, 5:24 a.m. UTC 
Incase of interrupt property is not present,
Driver is trying to free an invalid irq,
This patch fixes it by adding a check before freeing the irq.

Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
---
Changes for v2:
--> New patch.

 drivers/dma/xilinx/zynqmp_dma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c
index a297a26..f146458 100644
--- a/drivers/dma/xilinx/zynqmp_dma.c
+++ b/drivers/dma/xilinx/zynqmp_dma.c
@@ -851,7 +851,8 @@  static void zynqmp_dma_chan_remove(struct zynqmp_dma_chan *chan)
 	if (!chan)
 		return;
 
-	devm_free_irq(chan->zdev->dev, chan->irq, chan);
+	if (chan->irq)
+		devm_free_irq(chan->zdev->dev, chan->irq, chan);
 	tasklet_kill(&chan->tasklet);
 	list_del(&chan->common.device_node);
 }