The ipc_mux_dl_acbcmd_decode() calls the ipc_mux_dl_acb_send_cmds(),
but does not report the error if ipc_mux_dl_acb_send_cmds() fails.
This makes it difficult to detect command sending failures. A proper
implementation can be found in ipc_mux_dl_cmd_decode().

Add error reporting to the call, logging an error message using dev_err()
if the command sending fails.

Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
 drivers/net/wwan/iosm/iosm_ipc_mux_codec.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wwan/iosm/iosm_ipc_mux_codec.c b/drivers/net/wwan/iosm/iosm_ipc_mux_codec.c
index bff46f7ca59f..478c9c8b638b 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_mux_codec.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_mux_codec.c
@@ -509,8 +509,11 @@ static void ipc_mux_dl_acbcmd_decode(struct iosm_mux *ipc_mux,
 			return;
 			}
 		trans_id = le32_to_cpu(cmdh->transaction_id);
-		ipc_mux_dl_acb_send_cmds(ipc_mux, cmd, cmdh->if_id,
-					 trans_id, cmd_p, size, false, true);
+		if (ipc_mux_dl_acb_send_cmds(ipc_mux, cmd, cmdh->if_id,
+					     trans_id, cmd_p, size, false, true))
+			dev_err(ipc_mux->dev,
+				"if_id %d: cmd send failed",
+				cmdh->if_id);
 	}
 }
 
-- 
2.42.0.windows.2

On 05.04.2025 14:52, Wentao Liang wrote:
> The ipc_mux_dl_acbcmd_decode() calls the ipc_mux_dl_acb_send_cmds(),
> but does not report the error if ipc_mux_dl_acb_send_cmds() fails.
> This makes it difficult to detect command sending failures. A proper
> implementation can be found in ipc_mux_dl_cmd_decode().
> 
> Add error reporting to the call, logging an error message using dev_err()
> if the command sending fails.
> 
> Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
> ---
>   drivers/net/wwan/iosm/iosm_ipc_mux_codec.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/wwan/iosm/iosm_ipc_mux_codec.c b/drivers/net/wwan/iosm/iosm_ipc_mux_codec.c
> index bff46f7ca59f..478c9c8b638b 100644
> --- a/drivers/net/wwan/iosm/iosm_ipc_mux_codec.c
> +++ b/drivers/net/wwan/iosm/iosm_ipc_mux_codec.c
> @@ -509,8 +509,11 @@ static void ipc_mux_dl_acbcmd_decode(struct iosm_mux *ipc_mux,
>   			return;
>   			}
>   		trans_id = le32_to_cpu(cmdh->transaction_id);
> -		ipc_mux_dl_acb_send_cmds(ipc_mux, cmd, cmdh->if_id,
> -					 trans_id, cmd_p, size, false, true);
> +		if (ipc_mux_dl_acb_send_cmds(ipc_mux, cmd, cmdh->if_id,
> +					     trans_id, cmd_p, size, false, true))
> +			dev_err(ipc_mux->dev,
> +				"if_id %d: cmd send failed",
> +				cmdh->if_id);
>   	}
>   }

Looks good. One nit pick. The full stop is not needed in the subject. 
But I believe, this does not worth to resend the patch.

Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>