[PATCH AUTOSEL 5.13 104/108] perf/x86/intel/uncore: Clean up error handling path of iio mapping
From: Sasha Levin <sashal@kernel.org>
Date: 2021-07-14 19:43:14
Also in:
linux-perf-users, lkml
Subsystem:
performance events subsystem, the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds, Thomas Gleixner, Borislav Petkov, Dave Hansen
From: Kan Liang <redacted>
[ Upstream commit d4ba0b06306a70c99a43f9d452886a86e2d3bd26 ]
The error handling path of iio mapping looks fragile. We already fixed
one issue caused by it, commit f797f05d917f ("perf/x86/intel/uncore:
Fix for iio mapping on Skylake Server"). Clean up the error handling
path and make the code robust.
Reported-by: gushengxian <redacted>
Signed-off-by: Kan Liang <redacted>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/40e66cf9-398b-20d7-ce4d-433be6e08921@linux.intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/x86/events/intel/uncore_snbep.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c
index 3a75a2c601c2..1f7bb4898a9d 100644
--- a/arch/x86/events/intel/uncore_snbep.c
+++ b/arch/x86/events/intel/uncore_snbep.c@@ -3789,11 +3789,11 @@ static int skx_iio_set_mapping(struct intel_uncore_type *type) /* One more for NULL. */ attrs = kcalloc((uncore_max_dies() + 1), sizeof(*attrs), GFP_KERNEL); if (!attrs) - goto err; + goto clear_topology; eas = kcalloc(uncore_max_dies(), sizeof(*eas), GFP_KERNEL); if (!eas) - goto err; + goto clear_attrs; for (die = 0; die < uncore_max_dies(); die++) { sprintf(buf, "die%ld", die);
@@ -3814,7 +3814,9 @@ static int skx_iio_set_mapping(struct intel_uncore_type *type) for (; die >= 0; die--) kfree(eas[die].attr.attr.name); kfree(eas); +clear_attrs: kfree(attrs); +clear_topology: kfree(type->topology); clear_attr_update: type->attr_update = NULL;
--
2.30.2