From 5ba080aada5e739165e0f38d5cc3b04c82b323c8 Mon Sep 17 00:00:00 2001
From: Kedareswara rao Appana <appana.durga.rao@xilinx.com>
Date: Thu, 7 Dec 2017 10:54:28 +0530
Subject: [PATCH] dmaengine: zynqmp_dma: Fix race condition in the probe
Git-commit: 5ba080aada5e739165e0f38d5cc3b04c82b323c8
Patch-mainline: v4.16-rc1
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/dma/xilinx/zynqmp_dma.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/dma/xilinx/zynqmp_dma.c
+++ b/drivers/dma/xilinx/zynqmp_dma.c
@@ -933,7 +933,8 @@ static void zynqmp_dma_chan_remove(struc
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);