diff mbox

rcar_fdp1: constify vb2_ops structure

Message ID 20170706202532.GA12160@embeddedgus (mailing list archive)
State Accepted
Headers show

Commit Message

Gustavo A. R. Silva July 6, 2017, 8:25 p.m. UTC
Check for vb2_ops structures that are only stored in the ops field of a
vb2_queue structure. That field is declared const, so vb2_ops structures
that have this property can be declared as const also.

This issue was detected using Coccinelle and the following semantic patch:

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct vb2_ops i@p = { ... };

@ok@
identifier r.i;
struct vb2_queue e;
position p;
@@
e.ops = &i@p;

@bad@
position p != {r.p,ok.p};
identifier r.i;
struct vb2_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct vb2_ops i = { ... };

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
---
 drivers/media/platform/rcar_fdp1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Kieran Bingham July 6, 2017, 10:41 p.m. UTC | #1
Hi Gustavo,

Thank you for the patch.

On 06/07/17 21:25, Gustavo A. R. Silva wrote:
> Check for vb2_ops structures that are only stored in the ops field of a
> vb2_queue structure. That field is declared const, so vb2_ops structures
> that have this property can be declared as const also.
> 
> This issue was detected using Coccinelle and the following semantic patch:
> 
> @r disable optional_qualifier@
> identifier i;
> position p;
> @@
> static struct vb2_ops i@p = { ... };
> 
> @ok@
> identifier r.i;
> struct vb2_queue e;
> position p;
> @@
> e.ops = &i@p;
> 
> @bad@
> position p != {r.p,ok.p};
> identifier r.i;
> struct vb2_ops e;
> @@
> e@i@p
> 
> @depends on !bad disable optional_qualifier@
> identifier r.i;
> @@
> static
> +const
> struct vb2_ops i = { ... };
> 
> Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>

Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

> ---
>  drivers/media/platform/rcar_fdp1.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/rcar_fdp1.c b/drivers/media/platform/rcar_fdp1.c
> index 3ee51fc..3245bc4 100644
> --- a/drivers/media/platform/rcar_fdp1.c
> +++ b/drivers/media/platform/rcar_fdp1.c
> @@ -2032,7 +2032,7 @@ static void fdp1_stop_streaming(struct vb2_queue *q)
>  	}
>  }
>  
> -static struct vb2_ops fdp1_qops = {
> +static const struct vb2_ops fdp1_qops = {
>  	.queue_setup	 = fdp1_queue_setup,
>  	.buf_prepare	 = fdp1_buf_prepare,
>  	.buf_queue	 = fdp1_buf_queue,
>
Gustavo A. R. Silva July 7, 2017, 7:42 p.m. UTC | #2
Hi Kieran,

Quoting Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>:

> Hi Gustavo,
>
> Thank you for the patch.
>

Absolutely, glad to help. :)

> On 06/07/17 21:25, Gustavo A. R. Silva wrote:
>> Check for vb2_ops structures that are only stored in the ops field of a
>> vb2_queue structure. That field is declared const, so vb2_ops structures
>> that have this property can be declared as const also.
>>
>> This issue was detected using Coccinelle and the following semantic patch:
>>
>> @r disable optional_qualifier@
>> identifier i;
>> position p;
>> @@
>> static struct vb2_ops i@p = { ... };
>>
>> @ok@
>> identifier r.i;
>> struct vb2_queue e;
>> position p;
>> @@
>> e.ops = &i@p;
>>
>> @bad@
>> position p != {r.p,ok.p};
>> identifier r.i;
>> struct vb2_ops e;
>> @@
>> e@i@p
>>
>> @depends on !bad disable optional_qualifier@
>> identifier r.i;
>> @@
>> static
>> +const
>> struct vb2_ops i = { ... };
>>
>> Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
>
> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>
>> ---
>>  drivers/media/platform/rcar_fdp1.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/media/platform/rcar_fdp1.c  
>> b/drivers/media/platform/rcar_fdp1.c
>> index 3ee51fc..3245bc4 100644
>> --- a/drivers/media/platform/rcar_fdp1.c
>> +++ b/drivers/media/platform/rcar_fdp1.c
>> @@ -2032,7 +2032,7 @@ static void fdp1_stop_streaming(struct vb2_queue *q)
>>  	}
>>  }
>>
>> -static struct vb2_ops fdp1_qops = {
>> +static const struct vb2_ops fdp1_qops = {
>>  	.queue_setup	 = fdp1_queue_setup,
>>  	.buf_prepare	 = fdp1_buf_prepare,
>>  	.buf_queue	 = fdp1_buf_queue,
>>

--
Gustavo A. R. Silva
diff mbox

Patch

diff --git a/drivers/media/platform/rcar_fdp1.c b/drivers/media/platform/rcar_fdp1.c
index 3ee51fc..3245bc4 100644
--- a/drivers/media/platform/rcar_fdp1.c
+++ b/drivers/media/platform/rcar_fdp1.c
@@ -2032,7 +2032,7 @@  static void fdp1_stop_streaming(struct vb2_queue *q)
 	}
 }
 
-static struct vb2_ops fdp1_qops = {
+static const struct vb2_ops fdp1_qops = {
 	.queue_setup	 = fdp1_queue_setup,
 	.buf_prepare	 = fdp1_buf_prepare,
 	.buf_queue	 = fdp1_buf_queue,