2022-06-14 14:15:04

by Dongliang Mu

Subject: [PATCH v2] hwmon: (occ) remove NULL check before kvfree

From: Dongliang Mu <[email protected]>

kvfree can handle NULL pointer as its argument.
According to coccinelle isnullfree check, remove NULL check
before kvfree operation.

Signed-off-by: Dongliang Mu <[email protected]>
---
v1->v2: modify the commit title and signature
drivers/hwmon/occ/p9_sbe.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/hwmon/occ/p9_sbe.c b/drivers/hwmon/occ/p9_sbe.c
index 42fc7b97bb34..01405ae2f9bd 100644
--- a/drivers/hwmon/occ/p9_sbe.c
+++ b/drivers/hwmon/occ/p9_sbe.c
@@ -55,8 +55,7 @@ static bool p9_sbe_occ_save_ffdc(struct p9_sbe_occ *ctx, const void *resp,
mutex_lock(&ctx->sbe_error_lock);
if (!ctx->sbe_error) {
if (resp_len > ctx->ffdc_size) {
- if (ctx->ffdc)
- kvfree(ctx->ffdc);
+ kvfree(ctx->ffdc);
ctx->ffdc = kvmalloc(resp_len, GFP_KERNEL);
if (!ctx->ffdc) {
ctx->ffdc_len = 0;
@@ -171,8 +170,7 @@ static int p9_sbe_occ_remove(struct platform_device *pdev)
ctx->sbe = NULL;
occ_shutdown(occ);

- if (ctx->ffdc)
- kvfree(ctx->ffdc);
+ kvfree(ctx->ffdc);

return 0;
}
--
2.35.1

2022-06-15 15:44:55

by Guenter Roeck

Subject: Re: [PATCH v2] hwmon: (occ) remove NULL check before kvfree

On 6/14/22 06:30, Dongliang Mu wrote:
> From: Dongliang Mu <[email protected]>
>
> kvfree can handle NULL pointer as its argument.
> According to coccinelle isnullfree check, remove NULL check
> before kvfree operation.
>
> Signed-off-by: Dongliang Mu <[email protected]>

Actually, it turns out that I already got the same patch
and that it is already applied.

Thanks,
Guenter

> ---
> v1->v2: modify the commit title and signature
> drivers/hwmon/occ/p9_sbe.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/hwmon/occ/p9_sbe.c b/drivers/hwmon/occ/p9_sbe.c
> index 42fc7b97bb34..01405ae2f9bd 100644
> --- a/drivers/hwmon/occ/p9_sbe.c
> +++ b/drivers/hwmon/occ/p9_sbe.c
> @@ -55,8 +55,7 @@ static bool p9_sbe_occ_save_ffdc(struct p9_sbe_occ *ctx, const void *resp,
> mutex_lock(&ctx->sbe_error_lock);
> if (!ctx->sbe_error) {
> if (resp_len > ctx->ffdc_size) {
> - if (ctx->ffdc)
> - kvfree(ctx->ffdc);
> + kvfree(ctx->ffdc);
> ctx->ffdc = kvmalloc(resp_len, GFP_KERNEL);
> if (!ctx->ffdc) {
> ctx->ffdc_len = 0;
> @@ -171,8 +170,7 @@ static int p9_sbe_occ_remove(struct platform_device *pdev)
> ctx->sbe = NULL;
> occ_shutdown(occ);
>
> - if (ctx->ffdc)
> - kvfree(ctx->ffdc);
> + kvfree(ctx->ffdc);
>
> return 0;
> }