linux-kernel - [PATCH] mmc: mvsdio: Fix dma_unmap

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Message-ID: <20250826075812.82305-2-fourier.thomas@gmail.com>
Date: Tue, 26 Aug 2025 09:58:08 +0200
From: Thomas Fourier <fourier.thomas@...il.com>
To: 
Cc: Thomas Fourier <fourier.thomas@...il.com>,
	Nicolas Pitre <nico@...xnic.net>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Binbin Zhou <zhoubinbin@...ngson.cn>,
	Linus Walleij <linus.walleij@...aro.org>,
	Pierre Ossman <drzeus@...eus.cx>,
	linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mmc: mvsdio: Fix dma_unmap_sg() nents value

The dma_unmap_sg() functions should be called with the same nents as the
dma_map_sg(), not the value the map function returned.

Fixes: 236caa7cc351 ("mmc: SDIO driver for Marvell SoCs")
Signed-off-by: Thomas Fourier <fourier.thomas@...il.com>
---
 drivers/mmc/host/mvsdio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
index a9e6277789ba..79df2fa89a3f 100644
--- a/drivers/mmc/host/mvsdio.c
+++ b/drivers/mmc/host/mvsdio.c
@@ -292,7 +292,7 @@ static u32 mvsd_finish_data(struct mvsd_host *host, struct mmc_data *data,
 		host->pio_ptr = NULL;
 		host->pio_size = 0;
 	} else {
-		dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_frags,
+		dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
 			     mmc_get_dma_dir(data));
 	}
 
-- 
2.43.0