From: Alexander Antonov alexander.antonov@linux.intel.com
commit 6532783310e2b2f50dc13f46c49aa6546cb6e7a3 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: bb42b3d39781 ("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.i... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/events/intel/uncore_snbep.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)
--- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -3804,6 +3804,21 @@ static const struct attribute_group *skx 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; }