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| author |  Christophe JAILLET <christophe.jaillet@wanadoo.fr>
| 2023-05-18 10:18:08 +0200 |
|---|---|---|
| committer |  Will Deacon <will@kernel.org>
| 2023-06-05 15:01:27 +0100 |
| commit | 7bd42f122c7cf1e8101519dced3e07866b81e0d2 (patch) | |
| tree | ee7bbef002b3394a2e6331adac68e73244e7a138 /drivers/perf | |
| parent | perf/arm-cci: Slightly optimize cci_pmu_sync_counters() (diff) | |
| download | linux-7bd42f122c7cf1e8101519dced3e07866b81e0d2.tar.gz linux-7bd42f122c7cf1e8101519dced3e07866b81e0d2.tar.bz2 linux-7bd42f122c7cf1e8101519dced3e07866b81e0d2.zip | |
perf: qcom_l2_pmu: Make l2_cache_pmu_probe_cluster() more robust
If an error occurs after calling list_add(), the &l2cache_pmu->clusters
list will reference some memory that will be freed when the managed
resources will be released.
Move the list_add() at the end of the function when everything is in fine.
This is harmless because if l2_cache_pmu_probe_cluster() fails, then
l2_cache_pmu_probe() will fail as well and 'l2cache_pmu' will be released
as well.
But it looks cleaner and could silence static checker warning.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/6a0f5bdb6b7b2ed4ef194fc49693e902ad5b95ea.1684397879.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/qcom_l2_pmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/perf/qcom_l2_pmu.c b/drivers/perf/qcom_l2_pmu.c index aaca6db7d8f6..3f9a98c17a89 100644 --- a/drivers/perf/qcom_l2_pmu.c +++ b/drivers/perf/qcom_l2_pmu.c @@ -857,7 +857,6 @@ static int l2_cache_pmu_probe_cluster(struct device *dev, void *data) return -ENOMEM; INIT_LIST_HEAD(&cluster->next); - list_add(&cluster->next, &l2cache_pmu->clusters); cluster->cluster_id = fw_cluster_id; irq = platform_get_irq(sdev, 0); @@ -883,6 +882,7 @@ static int l2_cache_pmu_probe_cluster(struct device *dev, void *data) spin_lock_init(&cluster->pmu_lock); + list_add(&cluster->next, &l2cache_pmu->clusters); l2cache_pmu->num_pmus++; return 0; |