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perf/x86/intel/uncore: Clear attr_update properly 

commit 6532783310 upstream.

Current clear_attr_update procedure in pmu_set_mapping() sets attr_update
field in NULL that is not correct because intel_uncore_type pmu types can
contain several groups in attr_update field. For example, SPR platform
already has uncore_alias_group to update and then UPI topology group will
be added in next patches.

Fix current behavior and clear attr_update group related to mapping only.

Fixes: bb42b3d397 ("perf/x86/intel/uncore: Expose an Uncore unit to IIO PMON mapping")
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20221117122833.3103580-4-alexander.antonov@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Antonov 2022-11-17 12:28:25 +00:00 committed by Greg Kroah-Hartman
parent 08762dcb17
commit 420b4c9b66
1 changed files with 16 additions and 1 deletions
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17
arch/x86/events/intel/uncore_snbep.c
View File

@ -3804,6 +3804,21 @@ static const struct attribute_group *skx_iio_attr_update[] = {
NULL,
};
static void pmu_clear_mapping_attr(const struct attribute_group **groups,
struct attribute_group *ag)
{
int i;
for (i = 0; groups[i]; i++) {
if (groups[i] == ag) {
for (i++; groups[i]; i++)
groups[i - 1] = groups[i];
groups[i - 1] = NULL;
break;
}
}
}
static int
pmu_iio_set_mapping(struct intel_uncore_type *type, struct attribute_group *ag)
{
@ -3852,7 +3867,7 @@ clear_attrs:
clear_topology:
kfree(type->topology);
clear_attr_update:
type->attr_update = NULL;
pmu_clear_mapping_attr(type->attr_update, ag);
return ret;
}