[lkml]   [2020]   [Nov]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH] drm/bridge: cdns: fix reference leak in cdns_dsi_transfer
pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to putting operation will result in a
reference leak here.

A new function pm_runtime_resume_and_get is introduced in
[0] to keep usage counter balanced. So We fix the reference
leak by replacing it with new funtion.

[0] dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")

Fixes: e19233955d9e ("drm/bridge: Add Cadence DSI driver")
Reported-by: Hulk Robot <>
Signed-off-by: Qinglang Miao <>
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 76373e31d..b31281f76 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;

 \ /
  Last update: 2020-11-27 10:43    [W:0.020 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site