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From: "Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
To: mchehab+huawei@kernel.org, r.verdejo@samsung.com, nicolas@ndufresne.ca
Cc: linux-kernel@vger.kernel.org,
	linux-kernel-mentees@lists.linuxfoundation.org,
	"Daniel W . S . Almeida" <dwlsalmeida@gmail.com>,
	linux-media@vger.kernel.org
Subject: [Linux-kernel-mentees] [PATCH WIP 1/6] media: vidtv: extract the initial CRC value to into a #define
Date: Tue, 29 Sep 2020 00:26:20 -0300	[thread overview]
Message-ID: <20200929032625.1548909-1-dwlsalmeida@gmail.com> (raw)

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

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

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) ?
-- 
2.28.0

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             reply	other threads:[~2020-09-29  3:26 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-29  3:26 Daniel W. S. Almeida [this message]
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 ` [Linux-kernel-mentees] [PATCH WIP 1/6] media: vidtv: extract the initial CRC value to into a #define Mauro Carvalho Chehab
2020-09-29  9:30   ` Daniel W. S. Almeida
2020-09-29 14:51     ` Mauro Carvalho Chehab

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