From 89baa56be7fad333db0a91198bf4026017ab737d Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 22 Nov 2016 17:57:05 +0000 Subject: [PATCH] thermal/x86_pkg_temp: Remove redundant package search In pkg_temp_thermal_device_remove() the package device is searched at the beginning of the function. When the device refcount becomes zero another search for the same device is conducted. Remove the pointless loop and use the device pointer which was retrieved at the beginning of the function. Signed-off-by: Thomas Gleixner Tested-by: Srinivas Pandruvada Signed-off-by: Zhang Rui --- drivers/thermal/x86_pkg_temp_thermal.c | 33 +++++++++++--------------- 1 file changed, 14 insertions(+), 19 deletions(-) diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c index bbaade89b8ad..95573b2ef201 100644 --- a/drivers/thermal/x86_pkg_temp_thermal.c +++ b/drivers/thermal/x86_pkg_temp_thermal.c @@ -479,10 +479,8 @@ err_ret: static int pkg_temp_thermal_device_remove(unsigned int cpu) { - struct phy_dev_entry *n; + struct phy_dev_entry *phdev = pkg_temp_thermal_get_phy_entry(cpu); u16 phys_proc_id = topology_physical_package_id(cpu); - struct phy_dev_entry *phdev = - pkg_temp_thermal_get_phy_entry(cpu); if (!phdev) return -ENODEV; @@ -503,22 +501,19 @@ static int pkg_temp_thermal_device_remove(unsigned int cpu) --phdev->ref_cnt; pr_debug("thermal_device_remove: pkg: %d cpu %d ref_cnt %d\n", phys_proc_id, cpu, phdev->ref_cnt); - if (!phdev->ref_cnt) - list_for_each_entry_safe(phdev, n, &phy_dev_list, list) { - if (phdev->phys_proc_id == phys_proc_id) { - thermal_zone_device_unregister(phdev->tzone); - /* - * Restore original MSR value for package - * thermal interrupt. - */ - wrmsr_on_cpu(cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT, - phdev->start_pkg_therm_low, - phdev->start_pkg_therm_high); - list_del(&phdev->list); - kfree(phdev); - break; - } - } + + if (!phdev->ref_cnt) { + thermal_zone_device_unregister(phdev->tzone); + /* + * Restore original MSR value for package thermal + * interrupt. + */ + wrmsr_on_cpu(cpu, MSR_IA32_PACKAGE_THERM_INTERRUPT, + phdev->start_pkg_therm_low, + phdev->start_pkg_therm_high); + list_del(&phdev->list); + kfree(phdev); + } mutex_unlock(&phy_dev_list_mutex); return 0; -- 2.20.1