linux-kernel - [PATCH] media: cx23885: Add missing unmap in snd_cx23885_hw

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Message-Id: <20251210030217.53955-1-lihaoxiang@isrc.iscas.ac.cn>
Date: Wed, 10 Dec 2025 11:02:17 +0800
From: Haoxiang Li <lihaoxiang@...c.iscas.ac.cn>
To: mchehab@...nel.org,
	lihaoxiang@...c.iscas.ac.cn,
	hans.verkuil@...co.com
Cc: linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: [PATCH] media: cx23885: Add missing unmap in snd_cx23885_hw_params()

In error path, add cx23885_alsa_dma_unmap() to release the
resource acquired by cx23885_alsa_dma_map().

Fixes: 9529a4b0cf49 ("[media] cx23885: drop videobuf abuse in cx23885-alsa")
Cc: stable@...r.kernel.org
Signed-off-by: Haoxiang Li <lihaoxiang@...c.iscas.ac.cn>
---
 drivers/media/pci/cx23885/cx23885-alsa.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/pci/cx23885/cx23885-alsa.c b/drivers/media/pci/cx23885/cx23885-alsa.c
index 25dc8d4dc5b7..717fc6c9ef21 100644
--- a/drivers/media/pci/cx23885/cx23885-alsa.c
+++ b/drivers/media/pci/cx23885/cx23885-alsa.c
@@ -392,8 +392,10 @@ static int snd_cx23885_hw_params(struct snd_pcm_substream *substream,
 
 	ret = cx23885_risc_databuffer(chip->pci, &buf->risc, buf->sglist,
 				   chip->period_size, chip->num_periods, 1);
-	if (ret < 0)
+	if (ret < 0) {
+		cx23885_alsa_dma_unmap(chip);
 		goto error;
+	}
 
 	/* Loop back to start of program */
 	buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
-- 
2.25.1