diff options
| author | Shuhao Fu <sfual@cse.ust.hk> | 2025-10-06 03:31:17 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-02 12:56:39 +0100 |
| commit | e486de4c945d32e6205aa9b0404880956d01bb83 (patch) | |
| tree | 0d89c8d6eefd36407951b725c5746b44de27b0d6 /drivers/cpufreq/s5pv210-cpufreq.c | |
| parent | f916f071e41c637ea73aa0ea6f4551eedbd81ec9 (diff) | |
cpufreq: s5pv210: fix refcount leak
[ Upstream commit 2de5cb96060a1664880d65b120e59485a73588a8 ]
In function `s5pv210_cpu_init`, a possible refcount inconsistency has
been identified, causing a resource leak.
Why it is a bug:
1. For every clk_get, there should be a matching clk_put on every
successive error handling path.
2. After calling `clk_get(dmc1_clk)`, variable `dmc1_clk` will not be
freed even if any error happens.
How it is fixed: For every failed path, an extra goto label is added to
ensure `dmc1_clk` will be freed regardlessly.
Signed-off-by: Shuhao Fu <sfual@cse.ust.hk>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/cpufreq/s5pv210-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/s5pv210-cpufreq.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/cpufreq/s5pv210-cpufreq.c b/drivers/cpufreq/s5pv210-cpufreq.c index 4215621deb3f..ba8a1c96427a 100644 --- a/drivers/cpufreq/s5pv210-cpufreq.c +++ b/drivers/cpufreq/s5pv210-cpufreq.c @@ -518,7 +518,7 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy) if (policy->cpu != 0) { ret = -EINVAL; - goto out_dmc1; + goto out; } /* @@ -530,7 +530,7 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy) if ((mem_type != LPDDR) && (mem_type != LPDDR2)) { pr_err("CPUFreq doesn't support this memory type\n"); ret = -EINVAL; - goto out_dmc1; + goto out; } /* Find current refresh counter and frequency each DMC */ @@ -544,6 +544,8 @@ static int s5pv210_cpu_init(struct cpufreq_policy *policy) cpufreq_generic_init(policy, s5pv210_freq_table, 40000); return 0; +out: + clk_put(dmc1_clk); out_dmc1: clk_put(dmc0_clk); out_dmc0: |