linux-kernel - [PATCH] soundwire: stream: restore cumulative bus bandwidth when compute

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Date:   Thu, 16 Mar 2023 09:30:41 +0800
From:   Bard Liao <yung-chuan.liao@...ux.intel.com>
To:     alsa-devel@...a-project.org, vkoul@...nel.org
Cc:     vinod.koul@...aro.org, linux-kernel@...r.kernel.org,
        pierre-louis.bossart@...ux.intel.com, bard.liao@...el.com
Subject: [PATCH] soundwire: stream: restore cumulative bus bandwidth when compute_params callback failed

From: Shuming Fan <shumingf@...ltek.com>

The _sdw_prepare_stream function just returns the error code when
compute_params callback failed.
The cumulative bus bandwidth will keep the value and won't be decreased
by sdw_deprepare_stream function.
We should restore the value of cumulative bus bandwidth when
compute_params callback failed.

Signed-off-by: Shuming Fan <shumingf@...ltek.com>
Reviewed-by: Paul Olaru <paul.olaru@....nxp.com>
Reviewed-by: Rander Wang <rander.wang@...el.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
---
 drivers/soundwire/stream.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 8c6da1739e3d..136b6850a3f0 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -1369,7 +1369,7 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream,
 			if (ret < 0) {
 				dev_err(bus->dev, "Compute params failed: %d\n",
 					ret);
-				return ret;
+				goto restore_params;
 			}
 		}
 
-- 
2.25.1