From 1417f59ac0b02130ee56c0c50794b9b257be3d17 Mon Sep 17 00:00:00 2001
From: Hui Wang <hui.wang@canonical.com>
Date: Wed, 30 Nov 2022 17:08:00 +0800
Subject: [PATCH] dmaengine: imx-sdma: Fix a possible memory leak in sdma_transfer_init
Git-commit: 1417f59ac0b02130ee56c0c50794b9b257be3d17
Patch-mainline: v6.2-rc5
References: git-fixes
If the function sdma_load_context() fails, the sdma_desc will be
freed, but the allocated desc->bd is forgot to be freed.
We already met the sdma_load_context() failure case and the log as
Below:
[ 450.699064] imx-sdma 30bd0000.dma-controller: Timeout waiting for CH0 ready
...
In this case, the desc->bd will not be freed without this change.
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20221130090800.102035-1-hui.wang@canonical.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/dma/imx-sdma.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index fbea5f62dd98..b926abe4fa43 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1521,10 +1521,12 @@ static struct sdma_desc *sdma_transfer_init(struct sdma_channel *sdmac,
sdma_config_ownership(sdmac, false, true, false);
if (sdma_load_context(sdmac))
- goto err_desc_out;
+ goto err_bd_out;
return desc;
+err_bd_out:
+ sdma_free_bd(desc);
err_desc_out:
kfree(desc);
err_out:
--
2.35.3