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More thermal control updates for 5.20-rc1

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- Fix NULL pointer dereference in the thermal sysfs interface that
    results from an error code path mishandling (Rafael Wysocki).
 
  - Drop COMPILE_TEST dependency that's not needed any more from two
    thermal Kconfig entries (Jean Delvare).
 
  - Make the Intel TCC cooling driver support Alder Lake-N and Raptor
    Lake-P (Sumeet Pawnikar).
 
  - Fix possible path truncations in the tmon utility (Florian Fainelli).
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Merge tag 'thermal-5.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more thermal control updates from Rafael Wysocki:
 "These fix an error code path issue leading to a NULL pointer
  dereference, drop Kconfig dependencies that are not needed any more
  after recent changes, add CPU IDs for new chips to a driver and fix up
  the tmon utility.

  Specifics:

   - Fix NULL pointer dereference in the thermal sysfs interface that
     results from an error code path mishandling (Rafael Wysocki).

   - Drop COMPILE_TEST dependency that's not needed any more from two
     thermal Kconfig entries (Jean Delvare).

   - Make the Intel TCC cooling driver support Alder Lake-N and Raptor
     Lake-P (Sumeet Pawnikar).

   - Fix possible path truncations in the tmon utility (Florian
     Fainelli)"

* tag 'thermal-5.20-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  tools/thermal: Fix possible path truncations
  thermal: Drop obsolete dependency on COMPILE_TEST
  thermal: sysfs: Fix cooling_device_stats_setup() error code path
  thermal: intel: Add TCC cooling support for Alder Lake-N and Raptor Lake-P
This commit is contained in:
Linus Torvalds 2022-08-08 14:23:37 -07:00
commit 033c88d58b
4 changed files with 24 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/thermal/Kconfig
View File

@ -221,7 +221,7 @@ config THERMAL_EMULATION
config THERMAL_MMIO
tristate "Generic Thermal MMIO driver"
depends on OF || COMPILE_TEST
depends on OF
depends on HAS_IOMEM
help
This option enables the generic thermal MMIO driver that will use
@ -496,7 +496,7 @@ config SPRD_THERMAL
config KHADAS_MCU_FAN_THERMAL
tristate "Khadas MCU controller FAN cooling support"
depends on OF || COMPILE_TEST
depends on OF
depends on MFD_KHADAS_MCU
select MFD_CORE
select REGMAP

2
drivers/thermal/intel/intel_tcc_cooling.c
View File

@ -81,7 +81,9 @@ static const struct x86_cpu_id tcc_ids[] __initconst = {
X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE, NULL),
X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE, NULL),
X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_L, NULL),
X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE_N, NULL),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE, NULL),
X86_MATCH_INTEL_FAM6_MODEL(RAPTORLAKE_P, NULL),
{}
};

10
drivers/thermal/thermal_sysfs.c
View File

@ -813,12 +813,13 @@ static const struct attribute_group cooling_device_stats_attr_group = {
static void cooling_device_stats_setup(struct thermal_cooling_device *cdev)
{
const struct attribute_group *stats_attr_group = NULL;
struct cooling_dev_stats *stats;
unsigned long states;
int var;
if (cdev->ops->get_max_state(cdev, &states))
return;
goto out;
states++; /* Total number of states is highest state + 1 */
@ -828,7 +829,7 @@ static void cooling_device_stats_setup(struct thermal_cooling_device *cdev)
stats = kzalloc(var, GFP_KERNEL);
if (!stats)
return;
goto out;
stats->time_in_state = (ktime_t *)(stats + 1);
stats->trans_table = (unsigned int *)(stats->time_in_state + states);
@ -838,9 +839,12 @@ static void cooling_device_stats_setup(struct thermal_cooling_device *cdev)
spin_lock_init(&stats->lock);
stats_attr_group = &cooling_device_stats_attr_group;
out:
/* Fill the empty slot left in cooling_device_attr_groups */
var = ARRAY_SIZE(cooling_device_attr_groups) - 2;
cooling_device_attr_groups[var] = &cooling_device_stats_attr_group;
cooling_device_attr_groups[var] = stats_attr_group;
}
static void cooling_device_stats_destroy(struct thermal_cooling_device *cdev)

24
tools/thermal/tmon/sysfs.c
View File

@ -13,6 +13,7 @@
#include <stdint.h>
#include <dirent.h>
#include <libintl.h>
#include <limits.h>
#include <ctype.h>
#include <time.h>
#include <syslog.h>
@ -33,9 +34,9 @@ int sysfs_set_ulong(char *path, char *filename, unsigned long val)
{
FILE *fd;
int ret = -1;
char filepath[256];
char filepath[PATH_MAX + 2]; /* NUL and '/' */
snprintf(filepath, 256, "%s/%s", path, filename);
snprintf(filepath, sizeof(filepath), "%s/%s", path, filename);
fd = fopen(filepath, "w");
if (!fd) {
@ -57,9 +58,9 @@ static int sysfs_get_ulong(char *path, char *filename, unsigned long *p_ulong)
{
FILE *fd;
int ret = -1;
char filepath[256];
char filepath[PATH_MAX + 2]; /* NUL and '/' */
snprintf(filepath, 256, "%s/%s", path, filename);
snprintf(filepath, sizeof(filepath), "%s/%s", path, filename);
fd = fopen(filepath, "r");
if (!fd) {
@ -76,9 +77,9 @@ static int sysfs_get_string(char *path, char *filename, char *str)
{
FILE *fd;
int ret = -1;
char filepath[256];
char filepath[PATH_MAX + 2]; /* NUL and '/' */
snprintf(filepath, 256, "%s/%s", path, filename);
snprintf(filepath, sizeof(filepath), "%s/%s", path, filename);
fd = fopen(filepath, "r");
if (!fd) {
@ -199,8 +200,8 @@ static int find_tzone_cdev(struct dirent *nl, char *tz_name,
{
unsigned long trip_instance = 0;
char cdev_name_linked[256];
char cdev_name[256];
char cdev_trip_name[256];
char cdev_name[PATH_MAX];
char cdev_trip_name[PATH_MAX];
int cdev_id;
if (nl->d_type == DT_LNK) {
@ -213,7 +214,8 @@ static int find_tzone_cdev(struct dirent *nl, char *tz_name,
return -EINVAL;
}
/* find the link to real cooling device record binding */
snprintf(cdev_name, 256, "%s/%s", tz_name, nl->d_name);
snprintf(cdev_name, sizeof(cdev_name) - 2, "%s/%s",
tz_name, nl->d_name);
memset(cdev_name_linked, 0, sizeof(cdev_name_linked));
if (readlink(cdev_name, cdev_name_linked,
sizeof(cdev_name_linked) - 1) != -1) {
@ -226,8 +228,8 @@ static int find_tzone_cdev(struct dirent *nl, char *tz_name,
/* find the trip point in which the cdev is binded to
* in this tzone
*/
snprintf(cdev_trip_name, 256, "%s%s", nl->d_name,
"_trip_point");
snprintf(cdev_trip_name, sizeof(cdev_trip_name) - 1,
"%s%s", nl->d_name, "_trip_point");
sysfs_get_ulong(tz_name, cdev_trip_name,
&trip_instance);
/* validate trip point range, e.g. trip could return -1