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commit 333478a7eb21245880c89aad166ad08478cc577d
parent 0b0d4be6b4880c7199d41afe4d9a3f20f47fd9bb
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed, 23 Jan 2019 16:23:41 +1300

Merge branch 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux

Pull thermal management fixes from Zhang Rui:

 - Fix a race condition that sysfs could be accessed before necessary
   initialization in int340x thermal driver. (Aaron Hill)

 - Fix a NULL vs IS_ERR() check in int340x thermal driver. (Dan
   Carpenter)

* 'for-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  drivers: thermal: int340x_thermal: Fix sysfs race condition
  thermal: int340x_thermal: Fix a NULL vs IS_ERR() check

Diffstat:
Mdrivers/thermal/intel/int340x_thermal/processor_thermal_device.c | 30++++++++++++++++--------------
1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c @@ -84,7 +84,12 @@ static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \ struct pci_dev *pci_dev; \ struct platform_device *pdev; \ struct proc_thermal_device *proc_dev; \ -\ + \ + if (proc_thermal_emum_mode == PROC_THERMAL_NONE) { \ + dev_warn(dev, "Attempted to get power limit before device was initialized!\n"); \ + return 0; \ + } \ + \ if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) { \ pdev = to_platform_device(dev); \ proc_dev = platform_get_drvdata(pdev); \ @@ -298,11 +303,6 @@ static int proc_thermal_add(struct device *dev, *priv = proc_priv; ret = proc_thermal_read_ppcc(proc_priv); - if (!ret) { - ret = sysfs_create_group(&dev->kobj, - &power_limit_attribute_group); - - } if (ret) return ret; @@ -316,8 +316,7 @@ static int proc_thermal_add(struct device *dev, proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops); if (IS_ERR(proc_priv->int340x_zone)) { - ret = PTR_ERR(proc_priv->int340x_zone); - goto remove_group; + return PTR_ERR(proc_priv->int340x_zone); } else ret = 0; @@ -331,9 +330,6 @@ static int proc_thermal_add(struct device *dev, remove_zone: int340x_thermal_zone_remove(proc_priv->int340x_zone); -remove_group: - sysfs_remove_group(&proc_priv->dev->kobj, - &power_limit_attribute_group); return ret; } @@ -364,7 +360,10 @@ static int int3401_add(struct platform_device *pdev) platform_set_drvdata(pdev, proc_priv); proc_thermal_emum_mode = PROC_THERMAL_PLATFORM_DEV; - return 0; + dev_info(&pdev->dev, "Creating sysfs group for PROC_THERMAL_PLATFORM_DEV\n"); + + return sysfs_create_group(&pdev->dev.kobj, + &power_limit_attribute_group); } static int int3401_remove(struct platform_device *pdev) @@ -423,7 +422,7 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, proc_priv->soc_dts = intel_soc_dts_iosf_init( INTEL_SOC_DTS_INTERRUPT_MSI, 2, 0); - if (proc_priv->soc_dts && pdev->irq) { + if (!IS_ERR(proc_priv->soc_dts) && pdev->irq) { ret = pci_enable_msi(pdev); if (!ret) { ret = request_threaded_irq(pdev->irq, NULL, @@ -441,7 +440,10 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, dev_err(&pdev->dev, "No auxiliary DTSs enabled\n"); } - return 0; + dev_info(&pdev->dev, "Creating sysfs group for PROC_THERMAL_PCI\n"); + + return sysfs_create_group(&pdev->dev.kobj, + &power_limit_attribute_group); } static void proc_thermal_pci_remove(struct pci_dev *pdev)