From: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
Date: Wed, 10 Dec 2025 08:52:30 +0000 (+0800)
Subject: media: cx25821: Add missing unmap in snd_cx25821_hw_params()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=863f50d583445c3c8b28a0fc4bb9c18fd9656f41;p=thirdparty%2Fkernel%2Flinux.git

media: cx25821: Add missing unmap in snd_cx25821_hw_params()

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>
---

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;
 	}