Subject: Re: linux-next: manual merge of the thermal tree with the pm tree

From: Stephen Rothwell <[email-masked]>
Date: Thu, 5 Jan 2023 10:35:19 +1100

Hi all,

On Thu, 5 Jan 2023 10:10:54 +1100 Stephen Rothwell <[email-masked]> wrote:
> 
> Today's linux-next merge of the thermal tree got a conflict in:
> 
>   drivers/thermal/intel/x86_pkg_temp_thermal.c
> 
> between commit:
> 
>   58374a3970a0 ("thermal/x86_pkg_temp_thermal: Add support for handling dynamic tjmax")
> 
> from the pm tree and commit:
> 
>   03b2e86a24aa ("thermal/drivers/intel: Use generic thermal_zone_get_trip() function")
> 
> from the thermal tree.
> 
> I fixed it up (see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging.  You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.

Actually, the resolution I needed was this:

diff --cc drivers/thermal/intel/x86_pkg_temp_thermal.c
index 9e08d8c8f5fb,494f25250c2d..24c7774cc4a9
--- a/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@@ -107,56 -108,37 +108,17 @@@ static struct zone_device *pkg_temp_the
  static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
  {
  	struct zone_device *zonedev = tzd->devdata;
 -	u32 eax, edx;
 +	int val;
  
 -	rdmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_STATUS,
 -			&eax, &edx);
 -	if (eax & 0x80000000) {
 -		*temp = zonedev->tj_max - ((eax >> 16) & 0x7f) * 1000;
 -		pr_debug("sys_get_curr_temp %d\n", *temp);
 -		return 0;
 -	}
 -	return -EINVAL;
 +	val = intel_tcc_get_temp(zonedev->cpu, true);
 +	if (val < 0)
 +		return val;
 +
 +	*temp = val * 1000;
 +	pr_debug("sys_get_curr_temp %d\n", *temp);
 +	return 0;
  }
  
- static int sys_get_trip_temp(struct thermal_zone_device *tzd,
- 			     int trip, int *temp)
- {
- 	struct zone_device *zonedev = tzd->devdata;
- 	unsigned long thres_reg_value;
- 	u32 mask, shift, eax, edx;
- 	int tj_max, ret;
- 
- 	if (trip >= MAX_NUMBER_OF_TRIPS)
- 		return -EINVAL;
- 
- 	if (trip) {
- 		mask = THERM_MASK_THRESHOLD1;
- 		shift = THERM_SHIFT_THRESHOLD1;
- 	} else {
- 		mask = THERM_MASK_THRESHOLD0;
- 		shift = THERM_SHIFT_THRESHOLD0;
- 	}
- 
- 	tj_max = intel_tcc_get_tjmax(zonedev->cpu);
- 	if (tj_max < 0)
- 		return tj_max;
- 	tj_max *= 1000;
- 
- 	ret = rdmsr_on_cpu(zonedev->cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT,
- 			   &eax, &edx);
- 	if (ret < 0)
- 		return ret;
- 
- 	thres_reg_value = (eax & mask) >> shift;
- 	if (thres_reg_value)
- 		*temp = tj_max - thres_reg_value * 1000;
- 	else
- 		*temp = THERMAL_TEMP_INVALID;
- 	pr_debug("sys_get_trip_temp %d\n", *temp);
- 
- 	return 0;
- }
- 
  static int
  sys_set_trip_temp(struct thermal_zone_device *tzd, int trip, int temp)
  {
@@@ -330,18 -340,25 +325,25 @@@ static int pkg_temp_thermal_device_add(
  
  	thres_count = clamp_val(thres_count, 0, MAX_NUMBER_OF_TRIPS);
  
- 	err = intel_tcc_get_tjmax(cpu);
- 	if (err < 0)
 -	err = get_tj_max(cpu, &tj_max);
 -	if (err)
--		return err;
++	tj_max = intel_tcc_get_tjmax(cpu);
++	if (tj_max < 0)
++		return tj_max;
++	tj_max *= 1000;
  
  	zonedev = kzalloc(sizeof(*zonedev), GFP_KERNEL);
  	if (!zonedev)
  		return -ENOMEM;
  
+ 	zonedev->trips = pkg_temp_thermal_trips_init(cpu, tj_max, thres_count);
+ 	if (IS_ERR(zonedev->trips)) {
+ 		err = PTR_ERR(zonedev->trips);
+ 		goto out_kfree_zonedev;
+ 	}
+ 
  	INIT_DELAYED_WORK(&zonedev->work, pkg_temp_thermal_threshold_work_fn);
  	zonedev->cpu = cpu;
- 	zonedev->tzone = thermal_zone_device_register("x86_pkg_temp",
- 			thres_count,
 -	zonedev->tj_max = tj_max;
+ 	zonedev->tzone = thermal_zone_device_register_with_trips("x86_pkg_temp",
+ 			zonedev->trips, thres_count,
  			(thres_count == MAX_NUMBER_OF_TRIPS) ? 0x03 : 0x01,
  			zonedev, &tzone_ops, &pkg_temp_tz_params, 0, 0);
  	if (IS_ERR(zonedev->tzone)) {

-- 
Cheers,
Stephen Rothwell