linux-kernel - [PATCH 1/2] dmaengine: fsldma: Fix a resource leak in the remove function

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Date:   Sat, 12 Dec 2020 17:05:16 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     leoyang.li@....com, zw@...kernel.org, vkoul@...nel.org,
        dan.j.williams@...el.com, timur@...escale.com
Cc:     linuxppc-dev@...ts.ozlabs.org, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 1/2] dmaengine: fsldma: Fix a resource leak in the remove function

A 'irq_dispose_mapping()' call is missing in the remove function.
Add it.

This is needed to undo the 'irq_of_parse_and_map() call from the probe
function and already part of the error handling path of the probe function.

It was added in the probe function only in commit d3f620b2c4fe ("fsldma:
simplify IRQ probing and handling")

Fixes: 77cd62e8082b ("fsldma: allow Freescale Elo DMA driver to be compiled as a module")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Patch provided as-is.
I don't have the configuration to compile test this patch
---
 drivers/dma/fsldma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 0feb323bae1e..554f70a0c18c 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -1314,6 +1314,7 @@ static int fsldma_of_remove(struct platform_device *op)
 		if (fdev->chan[i])
 			fsl_dma_chan_remove(fdev->chan[i]);
 	}
+	irq_dispose_mapping(fdev->irq);
 
 	iounmap(fdev->regs);
 	kfree(fdev);
-- 
2.27.0