Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-14 23:25:54 +00:00
Code Issues Packages Projects Releases Wiki Activity

can: length: can_fd_len2dlc(): make legnth calculation readable again

Browse Source 
In commit 652562e5ff ("can: length: can_fd_len2dlc(): simplify length
calculcation") the readability of the code degraded and became more error
prone. To counteract this, partially convert that patch and replace open coded
values (of the original code) with proper defines.

Fixes: 652562e5ff ("can: length: can_fd_len2dlc(): simplify length calculcation")
Cc: Vincent MAILHOL <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/r/20210118201346.79422-1-socketcan@hartkopp.net
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde 2021-01-17 23:06:28 +01:00
parent 6fe27d68b4
commit 54eca60b1c
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/can/dev/length.c
View File

@ -27,12 +27,17 @@ static const u8 len2dlc[] = {
13, 13, 13, 13, 13, 13, 13, 13, /* 25 - 32 */
14, 14, 14, 14, 14, 14, 14, 14, /* 33 - 40 */
14, 14, 14, 14, 14, 14, 14, 14, /* 41 - 48 */
15, 15, 15, 15, 15, 15, 15, 15, /* 49 - 56 */
15, 15, 15, 15, 15, 15, 15, 15 /* 57 - 64 */
};
/* map the sanitized data length to an appropriate data length code */
u8 can_fd_len2dlc(u8 len)
{
if (len >= ARRAY_SIZE(len2dlc))
/* check for length mapping table size at build time */
BUILD_BUG_ON(ARRAY_SIZE(len2dlc) != CANFD_MAX_DLEN + 1);
if (unlikely(len > CANFD_MAX_DLEN))
return CANFD_MAX_DLC;
return len2dlc[len];