[PATCH WIP 1/6] media: vidtv: extract the initial CRC value to into a #define

Daniel W. S. Almeida
2020-09-29T03:26:37Z

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