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From:   Zou Wei <zou_wei@huawei.com>
To:     <a.hajda@samsung.com>, <narmstrong@baylibre.com>,
        <robert.foss@linaro.org>, <Laurent.pinchart@ideasonboard.com>,
        <jonas@kwiboo.se>, <jernej.skrabec@gmail.com>, <airlied@linux.ie>,
        <daniel@ffwll.ch>
CC:     <dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>,
        Zou Wei <zou_wei@huawei.com>
Subject: [PATCH -next] drm/bridge: cdns: Fix PM reference leak in cdns_dsi_transfer()
Date:   Mon, 24 May 2021 15:21:02 +0800
Message-ID: <1621840862-106024-1-git-send-email-zou_wei@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
---
 drivers/gpu/drm/bridge/cdns-dsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c
index 76373e3..b31281f 100644
--- a/drivers/gpu/drm/bridge/cdns-dsi.c
+++ b/drivers/gpu/drm/bridge/cdns-dsi.c
@@ -1028,7 +1028,7 @@ static ssize_t cdns_dsi_transfer(struct mipi_dsi_host *host,
 	struct mipi_dsi_packet packet;
 	int ret, i, tx_len, rx_len;
 
-	ret = pm_runtime_get_sync(host->dev);
+	ret = pm_runtime_resume_and_get(host->dev);
 	if (ret < 0)
 		return ret;
 
-- 
2.6.2