From: Zou Wei Date: Mon, 24 May 2021 07:21:02 +0000 (+0800) Subject: drm/bridge: cdns: Fix PM reference leak in cdns_dsi_transfer() X-Git-Tag: v5.12.18~202 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cf27261cda0bb553e3d30976673d130db18dfa69;p=thirdparty%2Fkernel%2Fstable.git drm/bridge: cdns: Fix PM reference leak in cdns_dsi_transfer() [ Upstream commit 33f90f27e1c5ccd648d3e78a1c28be9ee8791cf1 ] 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 Signed-off-by: Zou Wei Reviewed-by: Robert Foss Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/1621840862-106024-1-git-send-email-zou_wei@huawei.com Signed-off-by: Sasha Levin --- diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c index 76373e31df92d..b31281f76117c 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;