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authorPavel Machek (CIP) <pavel@denx.de>2021-04-06 14:54:14 +0300
committerThierry Reding <treding@nvidia.com>2021-05-17 13:31:05 +0300
commit73a395c46704304b96bc5e2ee19be31124025c0c (patch)
tree12ca6f8f9a5397487ee9e8fff732e855cbf3c1eb /drivers/gpu/drm/tegra/sor.c
parent6efb943b8616ec53a5e444193dccf1af9ad627b5 (diff)
downloadlinux-73a395c46704304b96bc5e2ee19be31124025c0c.tar.xz
drm/tegra: sor: Do not leak runtime PM reference
It's theoretically possible for the runtime PM reference to leak if the code fails anywhere between the pm_runtime_resume_and_get() and pm_runtime_put() calls, so make sure to release the runtime PM reference in that case. Practically this will never happen because none of the functions will fail on Tegra, but it's better for the code to be pedantic in case these assumptions will ever become wrong. Signed-off-by: Pavel Machek (CIP) <pavel@denx.de> [treding@nvidia.com: add commit message] Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/drm/tegra/sor.c')
-rw-r--r--drivers/gpu/drm/tegra/sor.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index 7b88261f57bb..67a80dae1c00 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -3125,21 +3125,21 @@ static int tegra_sor_init(struct host1x_client *client)
if (err < 0) {
dev_err(sor->dev, "failed to acquire SOR reset: %d\n",
err);
- return err;
+ goto rpm_put;
}
err = reset_control_assert(sor->rst);
if (err < 0) {
dev_err(sor->dev, "failed to assert SOR reset: %d\n",
err);
- return err;
+ goto rpm_put;
}
}
err = clk_prepare_enable(sor->clk);
if (err < 0) {
dev_err(sor->dev, "failed to enable clock: %d\n", err);
- return err;
+ goto rpm_put;
}
usleep_range(1000, 3000);
@@ -3150,7 +3150,7 @@ static int tegra_sor_init(struct host1x_client *client)
dev_err(sor->dev, "failed to deassert SOR reset: %d\n",
err);
clk_disable_unprepare(sor->clk);
- return err;
+ goto rpm_put;
}
reset_control_release(sor->rst);
@@ -3171,6 +3171,12 @@ static int tegra_sor_init(struct host1x_client *client)
}
return 0;
+
+rpm_put:
+ if (sor->rst)
+ pm_runtime_put(sor->dev);
+
+ return err;
}
static int tegra_sor_exit(struct host1x_client *client)