linux-kernel - [PATCH AUTOSEL 5.6 303/606] soc: mediatek: cmdq: return send msg error code

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Message-Id: <20200608231211.3363633-303-sashal@kernel.org>
Date:   Mon,  8 Jun 2020 19:07:08 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>,
        CK Hu <ck.hu@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sasha Levin <sashal@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.6 303/606] soc: mediatek: cmdq: return send msg error code

From: Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>

[ Upstream commit 34c4e4072603ff5c174df73b973896abb76cbb51 ]

Return error code to client if send message fail,
so that client has chance to error handling.

Fixes: 576f1b4bc802 ("soc: mediatek: Add Mediatek CMDQ helper")
Signed-off-by: Dennis YC Hsieh <dennis-yc.hsieh@...iatek.com>
Reviewed-by: CK Hu <ck.hu@...iatek.com>
Link: https://lore.kernel.org/r/1583664775-19382-6-git-send-email-dennis-yc.hsieh@mediatek.com
Signed-off-by: Matthias Brugger <matthias.bgg@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index db37144ae98c..87ee9f767b7a 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -351,7 +351,9 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb,
 		spin_unlock_irqrestore(&client->lock, flags);
 	}
 
-	mbox_send_message(client->chan, pkt);
+	err = mbox_send_message(client->chan, pkt);
+	if (err < 0)
+		return err;
 	/* We can send next packet immediately, so just call txdone. */
 	mbox_client_txdone(client->chan, 0);
 
-- 
2.25.1