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Subject[PATCH 01/31] thermal: core: prevent zones with no types to be registered
Date
There are APIs that rely on tz->type. This patch
prevent thermal zones without it to be registered.

Cc: Zhang Rui <rui.zhang@intel.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
---
drivers/thermal/thermal_core.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index d4b5465..650e5fa 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1810,6 +1810,9 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
int passive = 0;
struct thermal_governor *governor;

+ if (!type || strlen(type) == 0)
+ return ERR_PTR(-EINVAL);
+
if (type && strlen(type) >= THERMAL_NAME_LENGTH)
return ERR_PTR(-EINVAL);

@@ -1835,7 +1838,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
return ERR_PTR(result);
}

- strlcpy(tz->type, type ? : "", sizeof(tz->type));
+ strlcpy(tz->type, type, sizeof(tz->type));
tz->ops = ops;
tz->tzp = tzp;
tz->device.class = &thermal_class;
@@ -1855,11 +1858,9 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
}

/* sys I/F */
- if (type) {
- result = device_create_file(&tz->device, &dev_attr_type);
- if (result)
- goto unregister;
- }
+ result = device_create_file(&tz->device, &dev_attr_type);
+ if (result)
+ goto unregister;

result = device_create_file(&tz->device, &dev_attr_temp);
if (result)
@@ -2008,8 +2009,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)

thermal_zone_device_set_polling(tz, 0);

- if (tz->type[0])
- device_remove_file(&tz->device, &dev_attr_type);
+ device_remove_file(&tz->device, &dev_attr_type);
device_remove_file(&tz->device, &dev_attr_temp);
if (tz->ops->get_mode)
device_remove_file(&tz->device, &dev_attr_mode);
--
2.1.4
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