target/linux/mediatek/patches-5.15/350-12-cpufreq-mediatek-Fix-potential-deadlock-problem-in-m.patch

   1 From 6a1bd7cf4ed7a1948f564aaf16d34b7352c0029b Mon Sep 17 00:00:00 2001
   2 From: Wan Jiabing <wanjiabing@vivo.com>
   3 Date: Tue, 10 May 2022 17:05:31 +0800
   4 Subject: [PATCH 12/21] cpufreq: mediatek: Fix potential deadlock problem in
   5  mtk_cpufreq_set_target
   6
   7 Fix following coccichek error:
   8 ./drivers/cpufreq/mediatek-cpufreq.c:199:2-8: preceding lock on line
   9 ./drivers/cpufreq/mediatek-cpufreq.c:208:2-8: preceding lock on line
  10
  11 mutex_lock is acquired but not released before return.
  12 Use 'goto out' to help releasing the mutex_lock.
  13
  14 Fixes: c210063b40ac ("cpufreq: mediatek: Add opp notification support")
  15 Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
  16 Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
  17 Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
  18 ---
  19  drivers/cpufreq/mediatek-cpufreq.c | 6 ++++--
  20  1 file changed, 4 insertions(+), 2 deletions(-)
  21
  22 --- a/drivers/cpufreq/mediatek-cpufreq.c
  23 +++ b/drivers/cpufreq/mediatek-cpufreq.c
  24 @@ -196,7 +196,8 @@ static int mtk_cpufreq_set_target(struct
  25
  26         if (pre_vproc < 0) {
  27                 dev_err(cpu_dev, "invalid Vproc value: %d\n", pre_vproc);
  28 -               return pre_vproc;
  29 +               ret = pre_vproc;
  30 +               goto out;
  31         }
  32
  33         freq_hz = freq_table[index].frequency * 1000;
  34 @@ -205,7 +206,8 @@ static int mtk_cpufreq_set_target(struct
  35         if (IS_ERR(opp)) {
  36                 dev_err(cpu_dev, "cpu%d: failed to find OPP for %ld\n",
  37                         policy->cpu, freq_hz);
  38 -               return PTR_ERR(opp);
  39 +               ret = PTR_ERR(opp);
  40 +               goto out;
  41         }
  42         vproc = dev_pm_opp_get_voltage(opp);
  43         dev_pm_opp_put(opp);