linux-kernel - [PATCH 1/1] dmaengine: fsl-edma: fix DMA channel leak in eDMAv4

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Message-Id: <20231127214325.2477247-1-Frank.Li@nxp.com>
Date:   Mon, 27 Nov 2023 16:43:25 -0500
From:   Frank Li <Frank.Li@....com>
To:     Vinod Koul <vkoul@...nel.org>,
        imx@...ts.linux.dev (open list:FREESCALE eDMA DRIVER),
        dmaengine@...r.kernel.org (open list:FREESCALE eDMA DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 1/1] dmaengine: fsl-edma: fix DMA channel leak in eDMAv4

Allocate channel count consistently increases due to a missing source ID
(srcid) cleanup in the fsl_edma_free_chan_resources() function at imx93
eDMAv4.

Reset 'srcid' at fsl_edma_free_chan_resources().

Cc: stable@...r.kernel.org
Fixes: 72f5801a4e2b ("dmaengine: fsl-edma: integrate v3 support")
Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/dma/fsl-edma-common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
index 49e6cfc285029..c8acff09308fd 100644
--- a/drivers/dma/fsl-edma-common.c
+++ b/drivers/dma/fsl-edma-common.c
@@ -837,6 +837,7 @@ void fsl_edma_free_chan_resources(struct dma_chan *chan)
 	dma_pool_destroy(fsl_chan->tcd_pool);
 	fsl_chan->tcd_pool = NULL;
 	fsl_chan->is_sw = false;
+	fsl_chan->srcid = 0;
 }
 
 void fsl_edma_cleanup_vchan(struct dma_device *dmadev)
-- 
2.34.1