linux-kernel - [PATCH v2] mmc: wmt-sdmmc: Fix an error handling path in wmt_mci

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Date:   Thu, 22 Sep 2022 21:06:40 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     ulf.hansson@...aro.org, cjb@...top.org, dan.carpenter@...cle.com
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-mmc@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH v2] mmc: wmt-sdmmc: Fix an error handling path in wmt_mci_probe()

A dma_free_coherent() call is missing in the error handling path of the
probe, as already done in the remove function.

Fixes: 3a96dff0f828 ("mmc: SD/MMC Host Controller for Wondermedia WM8505/WM8650")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Changes since v1:
  * Add and use the (ugly named) 'fail5_and_a_half' label   [Dan Carpenter <dan.carpenter@...cle.com>]

v1: https://lore.kernel.org/all/bf2e2e69226b20d173cce66287f59488fd47474b.1646588375.git.christophe.jaillet@wanadoo.fr/
---
 drivers/mmc/host/wmt-sdmmc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c
index 163ac9df8cca..9b5c503e3a3f 100644
--- a/drivers/mmc/host/wmt-sdmmc.c
+++ b/drivers/mmc/host/wmt-sdmmc.c
@@ -846,7 +846,7 @@ static int wmt_mci_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->clk_sdmmc)) {
 		dev_err(&pdev->dev, "Error getting clock\n");
 		ret = PTR_ERR(priv->clk_sdmmc);
-		goto fail5;
+		goto fail5_and_a_half;
 	}
 
 	ret = clk_prepare_enable(priv->clk_sdmmc);
@@ -863,6 +863,9 @@ static int wmt_mci_probe(struct platform_device *pdev)
 	return 0;
 fail6:
 	clk_put(priv->clk_sdmmc);
+fail5_and_a_half:
+	dma_free_coherent(&pdev->dev, mmc->max_blk_count * 16,
+			  priv->dma_desc_buffer, priv->dma_desc_device_addr);
 fail5:
 	free_irq(dma_irq, priv);
 fail4:
-- 
2.34.1