linux-kernel - [PATCH 2/5] dmaengine: mv_xor_v2: kill the tasklets upon exit

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Date:   Tue, 17 Jul 2018 13:30:00 +0300
From:   <hannah@...vell.com>
To:     <dan.j.williams@...el.com>, <vkoul@...nel.org>,
        <dmaengine@...r.kernel.org>
CC:     <thomas.petazzoni@...tlin.com>, <linux-kernel@...r.kernel.org>,
        <nadavh@...vell.com>, <omrii@...vell.com>, <oferh@...vell.com>,
        <gregory.clement@...tlin.com>, Hanna Hawa <hannah@...vell.com>
Subject: [PATCH 2/5] dmaengine: mv_xor_v2: kill the tasklets upon exit

From: Hanna Hawa <hannah@...vell.com>

The mv_xor_v2 driver uses a tasklet, initialized during the probe()
routine. However, it forgets to cleanup the tasklet using
tasklet_kill() function during the remove() routine, which this patch
fixes. This prevents the tasklet from potentially running after the
module has been removed.

Fixes: 19a340b1a820 ("dmaengine: mv_xor_v2: new driver")

Signed-off-by: Hanna Hawa <hannah@...vell.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@...tlin.com>
---
 drivers/dma/mv_xor_v2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c
index e16083a..e718498 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -903,6 +903,8 @@ static int mv_xor_v2_remove(struct platform_device *pdev)
 
 	platform_msi_domain_free_irqs(&pdev->dev);
 
+	tasklet_kill(&xor_dev->irq_tasklet);
+
 	clk_disable_unprepare(xor_dev->clk);
 
 	return 0;
-- 
1.9.1