diff options
| author | Srinivas Pandruvada <srinivas.pandruvada@intel.com> | 2023-03-03 19:19:09 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-03-03 22:34:49 +0300 |
| commit | 52f04f10b9005ac4ce640da14a52ed7a146432fa (patch) | |
| tree | 84aafa1459373c291ff0d9909418460a0454f4af /drivers/thermal/intel | |
| parent | 0a3f9a6b0265b64c02226fcabb5e9a958307913b (diff) | |
| download | linux-52f04f10b9005ac4ce640da14a52ed7a146432fa.tar.xz | |
thermal: intel: int340x: processor_thermal: Fix deadlock
When user space updates the trip point there is a deadlock, which results
in caller gets blocked forever.
Commit 05eeee2b51b4 ("thermal/core: Protect sysfs accesses to thermal
operations with thermal zone mutex"), added a mutex for tz->lock in the
function trip_point_temp_store(). Hence, trip set callback() can't
call any thermal zone API as they are protected with the same mutex lock.
The callback here calling thermal_zone_device_enable(), which will result
in deadlock.
Move the thermal_zone_device_enable() to proc_thermal_pci_probe() to
avoid this deadlock.
Fixes: 05eeee2b51b4 ("thermal/core: Protect sysfs accesses to thermal operations with thermal zone mutex")
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@intel.com>
Cc: 6.2+ <stable@vger.kernel.org> # 6.2+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/thermal/intel')
| -rw-r--r-- | drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c index 40725cbc6eb0..90526f46c9b1 100644 --- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c +++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c @@ -166,7 +166,6 @@ static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_THRES_0, _temp); proc_thermal_mmio_write(pci_info, PROC_THERMAL_MMIO_INT_ENABLE_0, 1); - thermal_zone_device_enable(tzd); pci_info->stored_thres = temp; return 0; @@ -268,6 +267,10 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, const struct pci_device_ goto err_free_vectors; } + ret = thermal_zone_device_enable(pci_info->tzone); + if (ret) + goto err_free_vectors; + return 0; err_free_vectors: |