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hwmon fixes for v5.11-rc3

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Fix possible KASAN issue in amd_energy driver
 Avoid configuration problem in pwm-fan driver
 Fix kernel-doc warning in sbtsi_temp documentation
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Merge tag 'hwmon-for-v5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - Fix possible KASAN issue in amd_energy driver

 - Avoid configuration problem in pwm-fan driver

 - Fix kernel-doc warning in sbtsi_temp documentation

* tag 'hwmon-for-v5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (amd_energy) fix allocation of hwmon_channel_info config
  hwmon: (pwm-fan) Ensure that calculation doesn't discard big period values
  hwmon: (sbtsi_temp) Fix Documenation kernel-doc warning
This commit is contained in:
Linus Torvalds 2021-01-09 11:22:30 -08:00
commit 2ff90100ac
3 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/hwmon/sbtsi_temp.rst
View File

@ -1,7 +1,7 @@
.. SPDX-License-Identifier: GPL-2.0-or-later
Kernel driver sbtsi_temp
==================
========================
Supported hardware:

3
drivers/hwmon/amd_energy.c
View File

@ -222,7 +222,7 @@ static int amd_create_sensor(struct device *dev,
*/
cpus = num_present_cpus() / num_siblings;
s_config = devm_kcalloc(dev, cpus + sockets,
s_config = devm_kcalloc(dev, cpus + sockets + 1,
sizeof(u32), GFP_KERNEL);
if (!s_config)
return -ENOMEM;
@ -254,6 +254,7 @@ static int amd_create_sensor(struct device *dev,
scnprintf(label_l[i], 10, "Esocket%u", (i - cpus));
}
s_config[i] = 0;
return 0;
}

12
drivers/hwmon/pwm-fan.c
View File

@ -334,8 +334,18 @@ static int pwm_fan_probe(struct platform_device *pdev)
ctx->pwm_value = MAX_PWM;
/* Set duty cycle to maximum allowed and enable PWM output */
pwm_init_state(ctx->pwm, &state);
/*
* __set_pwm assumes that MAX_PWM * (period - 1) fits into an unsigned
* long. Check this here to prevent the fan running at a too low
* frequency.
*/
if (state.period > ULONG_MAX / MAX_PWM + 1) {
dev_err(dev, "Configured period too big\n");
return -EINVAL;
}
/* Set duty cycle to maximum allowed and enable PWM output */
state.duty_cycle = ctx->pwm->args.period - 1;
state.enabled = true;