Re: [PATCH 2/2] staging: dgnc: remove redundant null check in

[DaeSeok Youn]

2016-05-26 7:00 GMT+09:00 Luis de Bethencourt :
> On 20/05/16 10:51, Daeseok Youn wrote:
>> the "brd" was already checked for NULL before calling dgnc_do_remap().
>>
>> Signed-off-by: Daeseok Youn 
>> ---
>>  drivers/staging/dgnc/dgnc_driver.c | 3 ---
>>  1 file changed, 3 deletions(-)
>>
>> diff --git a/drivers/staging/dgnc/dgnc_driver.c 
>> b/drivers/staging/dgnc/dgnc_driver.c
>> index 22257d2..1882ef5 100644
>> --- a/drivers/staging/dgnc/dgnc_driver.c
>> +++ b/drivers/staging/dgnc/dgnc_driver.c
>> @@ -599,9 +599,6 @@ static int dgnc_finalize_board_init(struct dgnc_board 
>> *brd)
>>   */
>>  static void dgnc_do_remap(struct dgnc_board *brd)
>>  {
>> - if (!brd || brd->magic != DGNC_BOARD_MAGIC)
>> - return;
>> -
>>   brd->re_map_membase = ioremap(brd->membase, 0x1000);
>>  }
>>
>>
>
> Same comment as the 1/2 patch.
I sent an e-mail from the 1/2 patch. it has same reason for this patch.

dgnc_do_remap() function is called twice only in dgnc_found_board() function.
and also DNGC_BOARD_MAGIC was assigned into "brd->magic".

So I think it doesn't need to check about DGNC_BOARD_MAGIC.

thanks
regards,
Daeseok.

>
> Do you want to keep the brd->magic != DGNC_BOARD_MAGIC check?
>
> Thanks,
> Luis
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Re: [PATCH 2/2] staging: dgnc: remove redundant null check in

[Luis de Bethencourt]

On 20/05/16 10:51, Daeseok Youn wrote:
> the "brd" was already checked for NULL before calling dgnc_do_remap().
> 
> Signed-off-by: Daeseok Youn 
> ---
>  drivers/staging/dgnc/dgnc_driver.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/staging/dgnc/dgnc_driver.c 
> b/drivers/staging/dgnc/dgnc_driver.c
> index 22257d2..1882ef5 100644
> --- a/drivers/staging/dgnc/dgnc_driver.c
> +++ b/drivers/staging/dgnc/dgnc_driver.c
> @@ -599,9 +599,6 @@ static int dgnc_finalize_board_init(struct dgnc_board 
> *brd)
>   */
>  static void dgnc_do_remap(struct dgnc_board *brd)
>  {
> - if (!brd || brd->magic != DGNC_BOARD_MAGIC)
> - return;
> -
>   brd->re_map_membase = ioremap(brd->membase, 0x1000);
>  }
>  
> 

Same comment as the 1/2 patch.

Do you want to keep the brd->magic != DGNC_BOARD_MAGIC check?

Thanks,
Luis
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[PATCH 2/2] staging: dgnc: remove redundant null check in

[Daeseok Youn]

the "brd" was already checked for NULL before calling dgnc_do_remap().

Signed-off-by: Daeseok Youn 
---
 drivers/staging/dgnc/dgnc_driver.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/staging/dgnc/dgnc_driver.c 
b/drivers/staging/dgnc/dgnc_driver.c
index 22257d2..1882ef5 100644
--- a/drivers/staging/dgnc/dgnc_driver.c
+++ b/drivers/staging/dgnc/dgnc_driver.c
@@ -599,9 +599,6 @@ static int dgnc_finalize_board_init(struct dgnc_board *brd)
  */
 static void dgnc_do_remap(struct dgnc_board *brd)
 {
-   if (!brd || brd->magic != DGNC_BOARD_MAGIC)
-   return;
-
brd->re_map_membase = ioremap(brd->membase, 0x1000);
 }
 
-- 
1.9.1

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[PATCH 2/2] staging: dgnc: remove redundant NULL check in

[Daeseok Youn]

There were already checking NULL about channel_t / un_t
before calling dgnc_maxcps_room().

Signed-off-by: Daeseok Youn 
---
 drivers/staging/dgnc/dgnc_tty.c | 15 ++-
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c
index e97faaa..200d3aa 100644
--- a/drivers/staging/dgnc/dgnc_tty.c
+++ b/drivers/staging/dgnc/dgnc_tty.c
@@ -1536,19 +1536,8 @@ static int dgnc_tty_chars_in_buffer(struct tty_struct 
*tty)
  */
 static int dgnc_maxcps_room(struct tty_struct *tty, int bytes_available)
 {
-   struct channel_t *ch = NULL;
-   struct un_t *un = NULL;
-
-   if (!tty)
-   return bytes_available;
-
-   un = tty->driver_data;
-   if (!un || un->magic != DGNC_UNIT_MAGIC)
-   return bytes_available;
-
-   ch = un->un_ch;
-   if (!ch || ch->magic != DGNC_CHANNEL_MAGIC)
-   return bytes_available;
+   struct un_t *un = tty->driver_data;
+   struct channel_t *ch = un->un_ch;
 
/*
 * If its not the Transparent print device, return
-- 
1.9.1

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