[PATCH 6.18 513/752] media: cx25821: Add missing unmap in snd_cx25821_hw_params()

Sasha Levin
2026-02-28T17:55:26Z

From: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>

[ Upstream commit 863f50d583445c3c8b28a0fc4bb9c18fd9656f41 ]

In error path, add cx25821_alsa_dma_unmap() to release the
resource acquired by cx25821_alsa_dma_map()

Fixes: 8d8e6d6005de ("[media] cx28521: drop videobuf abuse in cx25821-alsa")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/pci/cx25821/cx25821-alsa.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/media/pci/cx25821/cx25821-alsa.c b/drivers/media/pci/cx25821/cx25821-alsa.c
index a42f0c03a7ca8..f463365163b7e 100644
--- a/drivers/media/pci/cx25821/cx25821-alsa.c
+++ b/drivers/media/pci/cx25821/cx25821-alsa.c
@@ -535,6 +535,7 @@ static int snd_cx25821_hw_params(struct snd_pcm_substream *substream,
chip->period_size, chip->num_periods, 1);
if (ret < 0) {
pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n");
+ cx25821_alsa_dma_unmap(chip);
goto error;
}

--
2.51.0