* [PATCH] x86 therm_throttle: handle sysfs errors
@ 2006-10-04 11:28 Jeff Garzik
2006-10-04 11:54 ` Andi Kleen
0 siblings, 1 reply; 2+ messages in thread
From: Jeff Garzik @ 2006-10-04 11:28 UTC (permalink / raw)
To: ak; +Cc: Andrew Morton, LKML
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
Not sure if NOTIFY_BAD is the correct way to handle the error.
Please review.
arch/i386/kernel/cpu/mcheck/therm_throt.c | 31 +++++++++++++++++++++---------
1 files changed, 22 insertions(+), 9 deletions(-)
diff --git a/arch/i386/kernel/cpu/mcheck/therm_throt.c b/arch/i386/kernel/cpu/mcheck/therm_throt.c
index 4f43047..86a47f7 100644
--- a/arch/i386/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/i386/kernel/cpu/mcheck/therm_throt.c
@@ -112,15 +112,13 @@ #ifdef CONFIG_SYSFS
/* Add/Remove thermal_throttle interface for CPU device */
static __cpuinit int thermal_throttle_add_dev(struct sys_device * sys_dev)
{
- sysfs_create_group(&sys_dev->kobj, &thermal_throttle_attr_group);
- return 0;
+ return sysfs_create_group(&sys_dev->kobj, &thermal_throttle_attr_group);
}
#ifdef CONFIG_HOTPLUG_CPU
-static __cpuinit int thermal_throttle_remove_dev(struct sys_device * sys_dev)
+static __cpuinit void thermal_throttle_remove_dev(struct sys_device * sys_dev)
{
sysfs_remove_group(&sys_dev->kobj, &thermal_throttle_attr_group);
- return 0;
}
/* Mutex protecting device creation against CPU hotplug */
@@ -133,19 +131,21 @@ static __cpuinit int thermal_throttle_cp
{
unsigned int cpu = (unsigned long)hcpu;
struct sys_device *sys_dev;
+ int rc = 0;
sys_dev = get_cpu_sysdev(cpu);
mutex_lock(&therm_cpu_lock);
switch (action) {
case CPU_ONLINE:
- thermal_throttle_add_dev(sys_dev);
+ rc = thermal_throttle_add_dev(sys_dev);
break;
case CPU_DEAD:
thermal_throttle_remove_dev(sys_dev);
break;
}
mutex_unlock(&therm_cpu_lock);
- return NOTIFY_OK;
+
+ return rc ? NOTIFY_BAD : NOTIFY_OK;
}
static struct notifier_block thermal_throttle_cpu_notifier =
@@ -156,7 +156,8 @@ #endif /* CONFIG_HOTPLUG_CPU */
static __init int thermal_throttle_init_device(void)
{
- unsigned int cpu = 0;
+ unsigned int cpu = 0, cpu_err;
+ int err = 0;
if (!atomic_read(&therm_throt_en))
return 0;
@@ -167,13 +168,25 @@ #ifdef CONFIG_HOTPLUG_CPU
mutex_lock(&therm_cpu_lock);
#endif
/* connect live CPUs to sysfs */
- for_each_online_cpu(cpu)
- thermal_throttle_add_dev(get_cpu_sysdev(cpu));
+ for_each_online_cpu(cpu) {
+ if (!err)
+ err = thermal_throttle_add_dev(get_cpu_sysdev(cpu));
+ }
+ if (err)
+ goto err_out;
+
#ifdef CONFIG_HOTPLUG_CPU
mutex_unlock(&therm_cpu_lock);
#endif
return 0;
+
+err_out:
+ for_each_online_cpu(cpu_err) {
+ if (cpu_err < cpu)
+ thermal_throttle_remove_dev(get_cpu_sysdev(cpu_err));
+ }
+ return err;
}
device_initcall(thermal_throttle_init_device);
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] x86 therm_throttle: handle sysfs errors
2006-10-04 11:28 [PATCH] x86 therm_throttle: handle sysfs errors Jeff Garzik
@ 2006-10-04 11:54 ` Andi Kleen
0 siblings, 0 replies; 2+ messages in thread
From: Andi Kleen @ 2006-10-04 11:54 UTC (permalink / raw)
To: Jeff Garzik; +Cc: Andrew Morton, LKML, dmitriyz
On Wednesday 04 October 2006 13:28, Jeff Garzik wrote:
>
> Signed-off-by: Jeff Garzik <jeff@garzik.org>
>
> ---
>
> Not sure if NOTIFY_BAD is the correct way to handle the error.
> Please review.
Best you cc the patch author.
(full quote)
-Andi
>
> arch/i386/kernel/cpu/mcheck/therm_throt.c | 31 +++++++++++++++++++++---------
> 1 files changed, 22 insertions(+), 9 deletions(-)
>
> diff --git a/arch/i386/kernel/cpu/mcheck/therm_throt.c b/arch/i386/kernel/cpu/mcheck/therm_throt.c
> index 4f43047..86a47f7 100644
> --- a/arch/i386/kernel/cpu/mcheck/therm_throt.c
> +++ b/arch/i386/kernel/cpu/mcheck/therm_throt.c
> @@ -112,15 +112,13 @@ #ifdef CONFIG_SYSFS
> /* Add/Remove thermal_throttle interface for CPU device */
> staticdmitriyz@google.com __cpuinit int thermal_throttle_add_dev(struct sys_device * sys_dev)
> {
> - sysfs_create_group(&sys_dev->kobj, &thermal_throttle_attr_group);
> - return 0;
> + return sysfs_create_group(&sys_dev->kobj, &thermal_throttle_attr_group);
> }
>
> #ifdef CONFIG_HOTPLUG_CPU
> -static __cpuinit int thermal_throttle_remove_dev(struct sys_device * sys_dev)
> +static __cpuinit void thermal_throttle_remove_dev(struct sys_device * sys_dev)
> {
> sysfs_remove_group(&sys_dev->kobj, &thermal_throttle_attr_group);
> - return 0;
> }
>
> /* Mutex protecting device creation against CPU hotplug */
> @@ -133,19 +131,21 @@ static __cpuinit int thermal_throttle_cp
> {
> unsigned int cpu = (unsigned long)hcpu;
> struct sys_device *sys_dev;
> + int rc = 0;
>
> sys_dev = get_cpu_sysdev(cpu);
> mutex_lock(&therm_cpu_lock);
> switch (action) {
> case CPU_ONLINE:
> - thermal_throttle_add_dev(sys_dev);
> + rc = thermal_throttle_add_dev(sys_dev);
> break;
> case CPU_DEAD:
> thermal_throttle_remove_dev(sys_dev);
> break;
> }
> mutex_unlock(&therm_cpu_lock);
> - return NOTIFY_OK;
> +
> + return rc ? NOTIFY_BAD : NOTIFY_OK;
> }
>
> static struct notifier_block thermal_throttle_cpu_notifier =
> @@ -156,7 +156,8 @@ #endif /* CONFIG_HOTPLUG_CPU */
>
> static __init int thermal_throttle_init_device(void)
> {
> - unsigned int cpu = 0;
> + unsigned int cpu = 0, cpu_err;
> + int err = 0;
>
> if (!atomic_read(&therm_throt_en))
> return 0;
> @@ -167,13 +168,25 @@ #ifdef CONFIG_HOTPLUG_CPU
> mutex_lock(&therm_cpu_lock);
> #endif
> /* connect live CPUs to sysfs */
> - for_each_online_cpu(cpu)
> - thermal_throttle_add_dev(get_cpu_sysdev(cpu));
> + for_each_online_cpu(cpu) {
> + if (!err)
> + err = thermal_throttle_add_dev(get_cpu_sysdev(cpu));
> + }
> + if (err)
> + goto err_out;
> +
> #ifdef CONFIG_HOTPLUG_CPU
> mutex_unlock(&therm_cpu_lock);
> #endif
>
> return 0;
> +
> +err_out:
> + for_each_online_cpu(cpu_err) {
> + if (cpu_err < cpu)
> + thermal_throttle_remove_dev(get_cpu_sysdev(cpu_err));
> + }
> + return err;
> }
>
> device_initcall(thermal_throttle_init_device);
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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