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dmaengine: zynqmp_dma: Fix race condition in the probe

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[ Upstream commit 5ba080aada ]

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>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kedareswara rao Appana 2017-12-07 10:54:28 +05:30 committed by Greg Kroah-Hartman
parent f4a0f85594
commit e2a6f2967f
1 changed files with 2 additions and 1 deletions
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3
drivers/dma/xilinx/zynqmp_dma.c
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@ -838,7 +838,8 @@ 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);
clk_disable_unprepare(chan->clk_apb);