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From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
To: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
Cc: r.verdejo@samsung.com, linux-kernel@vger.kernel.org,
	nicolas@ndufresne.ca,
	linux-kernel-mentees@lists.linuxfoundation.org,
	linux-media@vger.kernel.org
Subject: Re: [Linux-kernel-mentees] [PATCH WIP 1/6] media: vidtv: extract the initial CRC value to into a #define
Date: Tue, 29 Sep 2020 07:19:18 +0200	[thread overview]
Message-ID: <20200929071918.15c018ac@coco.lan> (raw)
In-Reply-To: <20200929032625.1548909-1-dwlsalmeida@gmail.com>

Em Tue, 29 Sep 2020 00:26:20 -0300
"Daniel W. S. Almeida" <dwlsalmeida@gmail.com> escreveu:

> From: Daniel W. S. Almeida <dwlsalmeida@gmail.com>

On a very quick look, patches seem good. Why did you mark them as WIP?

Next time, please add a patch 0, specially when you tag something as
WIP, or RFC.

> 
> The same constant (0xffffffff) is used in three different functions.

This one at least seems to be ready for merging ;-)

Regards,
Mauro
> 
> Extract it into a #define to avoid repetition.
> 
> Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
> ---
>  drivers/media/test-drivers/vidtv/vidtv_psi.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/test-drivers/vidtv/vidtv_psi.c b/drivers/media/test-drivers/vidtv/vidtv_psi.c
> index 3151b300a91b..a24e84adc8ce 100644
> --- a/drivers/media/test-drivers/vidtv/vidtv_psi.c
> +++ b/drivers/media/test-drivers/vidtv/vidtv_psi.c
> @@ -30,6 +30,7 @@
>  
>  #define CRC_SIZE_IN_BYTES 4
>  #define MAX_VERSION_NUM 32
> +#define INITIAL_CRC 0xffffffff
>  
>  static const u32 CRC_LUT[256] = {
>  	/* from libdvbv5 */
> @@ -794,7 +795,7 @@ u32 vidtv_psi_pat_write_into(struct vidtv_psi_pat_write_args args)
>  	/* the number of bytes written by this function */
>  	u32 nbytes = 0;
>  	const u16 pat_pid = VIDTV_PAT_PID;
> -	u32 crc = 0xffffffff;
> +	u32 crc = INITIAL_CRC;
>  
>  	struct vidtv_psi_table_pat_program *p = args.pat->program;
>  
> @@ -990,7 +991,7 @@ u32 vidtv_psi_pmt_write_into(struct vidtv_psi_pmt_write_args args)
>  {
>  	/* the number of bytes written by this function */
>  	u32 nbytes = 0;
> -	u32 crc = 0xffffffff;
> +	u32 crc = INITIAL_CRC;
>  
>  	struct vidtv_psi_desc *table_descriptor   = args.pmt->descriptor;
>  	struct vidtv_psi_table_pmt_stream *stream = args.pmt->stream;
> @@ -1143,7 +1144,7 @@ u32 vidtv_psi_sdt_write_into(struct vidtv_psi_sdt_write_args args)
>  	u32 nbytes  = 0;
>  	u16 sdt_pid = VIDTV_SDT_PID;  /* see ETSI EN 300 468 v1.15.1 p. 11 */
>  
> -	u32 crc = 0xffffffff;
> +	u32 crc = INITIAL_CRC;
>  
>  	struct vidtv_psi_table_sdt_service *service = args.sdt->service;
>  	struct vidtv_psi_desc *service_desc = (args.sdt->service) ?



Thanks,
Mauro
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  parent reply	other threads:[~2020-09-29  5:19 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-29  3:26 Daniel W. S. Almeida
2020-09-29  3:26 ` [Linux-kernel-mentees] [PATCH WIP 2/6] media: vidtv: psi: add a Network Information Table (NIT) Daniel W. S. Almeida
2020-09-29  3:26 ` [Linux-kernel-mentees] [PATCH WIP 3/6] media: vidtv: psi: Implement an Event Information Table (EIT) Daniel W. S. Almeida
2020-09-29  3:26 ` [Linux-kernel-mentees] [PATCH WIP 4/6] media: vidtv: psi: extract descriptor chaining code into a helper Daniel W. S. Almeida
2020-09-29  3:26 ` [Linux-kernel-mentees] [PATCH WIP 5/6] media: vidtv: Move s302m specific fields into encoder context Daniel W. S. Almeida
2020-09-29  3:26 ` [Linux-kernel-mentees] [PATCH WIP 6/6] media: vidtv: psi: fix missing assignments in while loops Daniel W. S. Almeida
2020-09-29  5:19 ` Mauro Carvalho Chehab [this message]
2020-09-29  9:30   ` [Linux-kernel-mentees] [PATCH WIP 1/6] media: vidtv: extract the initial CRC value to into a #define Daniel W. S. Almeida
2020-09-29 14:51     ` Mauro Carvalho Chehab

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