FAILED: Patch "media: cx25821: Add missing unmap in snd_cx25821_hw_params()" failed to apply to 6.12-stable tree

[Sasha Levin <sashal@kernel.org>]

The patch below does not apply to the 6.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From 863f50d583445c3c8b28a0fc4bb9c18fd9656f41 Mon Sep 17 00:00:00 2001
From: Haoxiang Li <lihaoxiang@isrc.iscas.ac.cn>
Date: Wed, 10 Dec 2025 16:52:30 +0800
Subject: [PATCH] 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>
---
 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