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Thermal control fixes for 6.4-rc1 

- Fix NULL pointer access in the Intel powerclamp thermal driver that
    occurs on attempts to set the cooling device state to 0 in the
    default configuration (Srinivas Pandruvada).
 
  - Drop the stale MAINTAINERS entry for the Intel Menlow thermal driver
    that has been removed recently (Lukas Bulwahn).
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Merge tag 'thermal-6.4-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull thermal control fixes from Rafael Wysocki:
 "These fix a NULL pointer dereference in the Intel powerclamp driver
  introduced during the 6.3 cycle and update MAINTAINERS to match recent
  code changes.

  Specifics:

   - Fix NULL pointer access in the Intel powerclamp thermal driver that
     occurs on attempts to set the cooling device state to 0 in the
     default configuration (Srinivas Pandruvada)

   - Drop the stale MAINTAINERS entry for the Intel Menlow thermal
     driver that has been removed recently (Lukas Bulwahn)"

* tag 'thermal-6.4-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  MAINTAINERS: remove section INTEL MENLOW THERMAL DRIVER
  thermal: intel: powerclamp: Fix NULL pointer access issue
This commit is contained in:
Linus Torvalds 2023-05-05 12:05:00 -07:00
parent b49178e68f 2492ba4cd0
commit 817e1af1b3
2 changed files with 4 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
MAINTAINERS
View File

@ -10556,12 +10556,6 @@ F: drivers/hwmon/intel-m10-bmc-hwmon.c
F: drivers/mfd/intel-m10-bmc*
F: include/linux/mfd/intel-m10-bmc.h
INTEL MENLOW THERMAL DRIVER
M: Sujith Thomas <sujith.thomas@intel.com>
L: linux-pm@vger.kernel.org
S: Supported
F: drivers/thermal/intel/intel_menlow.c
INTEL P-Unit IPC DRIVER
M: Zha Qipeng <qipeng.zha@intel.com>
L: platform-driver-x86@vger.kernel.org

4
drivers/thermal/intel/intel_powerclamp.c
View File

@ -703,6 +703,10 @@ static int powerclamp_set_cur_state(struct thermal_cooling_device *cdev,
new_target_ratio = clamp(new_target_ratio, 0UL,
(unsigned long) (max_idle - 1));
if (powerclamp_data.target_ratio == new_target_ratio)
goto exit_set;
if (!powerclamp_data.target_ratio && new_target_ratio > 0) {
pr_info("Start idle injection to reduce power\n");
powerclamp_data.target_ratio = new_target_ratio;