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Thermal: x86_pkg_temp: Limit number of pkg temp zones

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Although it is unlikley that physical package id is set to some
arbitary number, it is better to prevent in anycase. Since package
temp zones use this in thermal zone type and for allocation, added
a limit.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Srinivas Pandruvada 2013-07-15 15:38:52 -07:00 committed by Zhang Rui
parent c7c1b3112e
commit 94e791f522
1 changed files with 5 additions and 0 deletions
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5
drivers/thermal/x86_pkg_temp_thermal.c
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@ -54,6 +54,8 @@ MODULE_PARM_DESC(notify_delay_ms,
* is some wrong values returned by cpuid for number of thresholds.
*/
#define MAX_NUMBER_OF_TRIPS 2
/* Limit number of package temp zones */
#define MAX_PKG_TEMP_ZONE_IDS 256
struct phy_dev_entry {
struct list_head list;
@ -401,6 +403,9 @@ static int pkg_temp_thermal_device_add(unsigned int cpu)
if (!thres_count)
return -ENODEV;
if (topology_physical_package_id(cpu) > MAX_PKG_TEMP_ZONE_IDS)
return -ENODEV;
thres_count = clamp_val(thres_count, 0, MAX_NUMBER_OF_TRIPS);
err = get_tj_max(cpu, &tj_max);