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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-05-21 19:08:09 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-05-26 10:53:13 +0200 |
| commit | 64c7d7ea22d86cacb65d0c097cc447bc0e6d8abd (patch) | |
| tree | 1bf684e2099c121f791d207d6a39d88e077036b4 /drivers/clk | |
| parent | 3618bbaaa898cf48e859736120a775fcb56f3838 (diff) | |
| download | linux-64c7d7ea22d86cacb65d0c097cc447bc0e6d8abd.tar.bz2 | |
PM: runtime: clk: Fix clk_pm_runtime_get() error path
clk_pm_runtime_get() assumes that the PM-runtime usage counter will
be dropped by pm_runtime_get_sync() on errors, which is not the case,
so PM-runtime references to devices acquired by the former are leaked
on errors returned by the latter.
Fix this by modifying clk_pm_runtime_get() to drop the reference if
pm_runtime_get_sync() returns an error.
Fixes: 9a34b45397e5 clk: Add support for runtime PM
Cc: 4.15+ <stable@vger.kernel.org> # 4.15+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/clk.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index 2dfb30b963c4..407f6919604c 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -114,7 +114,11 @@ static int clk_pm_runtime_get(struct clk_core *core) return 0; ret = pm_runtime_get_sync(core->dev); - return ret < 0 ? ret : 0; + if (ret < 0) { + pm_runtime_put_noidle(core->dev); + return ret; + } + return 0; } static void clk_pm_runtime_put(struct clk_core *core) |