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drm/bridge: cdns: Fix PM reference leak in cdns_dsi_transfer()

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[ 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 <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1621840862-106024-1-git-send-email-zou_wei@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zou Wei 2021-05-24 15:21:02 +08:00 committed by Greg Kroah-Hartman
parent 95f8ce9f18
commit 0680344d71
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/bridge/cdns-dsi.c
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@ -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;