2011-05-09 06:32:42

by Joe Perches

Subject: [RFC PATCH] hpsa: Change memset using sizeof(ptr) to sizeof(*ptr)

Not at all sure this is correct or appropriate to change,
but this seems odd.

Found via coccinelle script

@@
type T;
T* ptr;
expression E1;
@@

* memset(E1, 0, sizeof(ptr));

Signed-off-by: Joe Perches <[email protected]>
---
drivers/scsi/hpsa.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 415ad4f..c8d97b4 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -1308,7 +1308,7 @@ static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
int retry_count = 0;

do {
- memset(c->err_info, 0, sizeof(c->err_info));
+ memset(c->err_info, 0, sizeof(*c->err_info));
hpsa_scsi_do_simple_cmd_core(h, c);
retry_count++;
} while (check_for_unit_attention(h, c) && retry_count <= 3);

2011-05-09 13:52:55

by Stephen M. Cameron

Subject: Re: [RFC PATCH] hpsa: Change memset using sizeof(ptr) to sizeof(*ptr)

On Sun, May 08, 2011 at 11:32:40PM -0700, Joe Perches wrote:
> Not at all sure this is correct or appropriate to change,
> but this seems odd.
>
> Found via coccinelle script

Ack.

-- steve

>
> @@
> type T;
> T* ptr;
> expression E1;
> @@
>
> * memset(E1, 0, sizeof(ptr));
>
> Signed-off-by: Joe Perches <[email protected]>
> ---
> drivers/scsi/hpsa.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
> index 415ad4f..c8d97b4 100644
> --- a/drivers/scsi/hpsa.c
> +++ b/drivers/scsi/hpsa.c
> @@ -1308,7 +1308,7 @@ static void hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
> int retry_count = 0;
>
> do {
> - memset(c->err_info, 0, sizeof(c->err_info));
> + memset(c->err_info, 0, sizeof(*c->err_info));
> hpsa_scsi_do_simple_cmd_core(h, c);
> retry_count++;
> } while (check_for_unit_attention(h, c) && retry_count <= 3);
>