From: Kedareswara rao Appana <appana.durga.rao@xilinx.com>
To: vinod.koul@intel.com, dan.j.williams@intel.com,
michal.simek@xilinx.com, appanad@xilinx.com, sr@denx.de,
dave.jiang@intel.com, kedare06@gmail.com
Cc: dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [v2,4/4] dmaengine: zynqmp_dma: Fix race condition in the probe
Date: Thu, 7 Dec 2017 10:54:28 +0530 [thread overview]
Message-ID: <1512624268-13944-5-git-send-email-appanad@xilinx.com> (raw)
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(-)
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);
}
reply other threads:[~2017-12-07 5:24 UTC|newest]
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