This is a note to let you know that I've just added the patch titled
memory: samsung: exynos5422-dmc: Avoid some over memory allocation
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
memory-samsung-exynos5422-dmc-avoid-some-over-memory.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c1cb8d8653c10140dbf87091a685dea30d1f1101
Author: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Date: Sun Mar 20 08:10:30 2022 +0100
memory: samsung: exynos5422-dmc: Avoid some over memory allocation
[ Upstream commit 56653827f0d7bc7c2d8bac0e119fd1521fa9990a ]
'dmc->counter' is a 'struct devfreq_event_dev **', so there is some
over memory allocation. 'counters_size' should be computed with
'sizeof(struct devfreq_event_dev *)'.
Use 'sizeof(*dmc->counter)' instead to fix it.
While at it, use devm_kcalloc() instead of devm_kzalloc()+open coded
multiplication.
Fixes: 6e7674c3c6df ("memory: Add DMC driver for Exynos5422")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Link: https://lore.kernel.org/r/69d7e69346986e2fdb994d4382954c932f9f0993.1647760213.git.christophe.jaillet@xxxxxxxxxx
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c
index 9c8318923ed0..4733e7898ffe 100644
--- a/drivers/memory/samsung/exynos5422-dmc.c
+++ b/drivers/memory/samsung/exynos5422-dmc.c
@@ -1322,7 +1322,6 @@ static int exynos5_dmc_init_clks(struct exynos5_dmc *dmc)
*/
static int exynos5_performance_counters_init(struct exynos5_dmc *dmc)
{
- int counters_size;
int ret, i;
dmc->num_counters = devfreq_event_get_edev_count(dmc->dev,
@@ -1332,8 +1331,8 @@ static int exynos5_performance_counters_init(struct exynos5_dmc *dmc)
return dmc->num_counters;
}
- counters_size = sizeof(struct devfreq_event_dev) * dmc->num_counters;
- dmc->counter = devm_kzalloc(dmc->dev, counters_size, GFP_KERNEL);
+ dmc->counter = devm_kcalloc(dmc->dev, dmc->num_counters,
+ sizeof(*dmc->counter), GFP_KERNEL);
if (!dmc->counter)
return -ENOMEM;
