xiaomi-sm8450/android_kernel_xiaomi_sm8450
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lib/crc7: Shift crc7() output left 1 bit

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This eliminates a 1-bit left shift in every single caller,
and makes the inner loop of the CRC computation more efficient.

Renamed crc7 to crc7_be (big-endian) since the interface changed.

Also purged #include <linux/crc7.h> from files that don't use it at all.

Signed-off-by: George Spelvin <linux@horizon.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
George Spelvin
2014-05-10 10:32:57 -04:00
committed by John W. Linville
parent d91a48cbae
commit 1836eea209
7 changed files with 53 additions and 49 deletions
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1
drivers/net/wireless/ti/wl1251/acx.c
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@@ -2,7 +2,6 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/crc7.h>
#include "wl1251.h"
#include "reg.h"

1
drivers/net/wireless/ti/wl1251/cmd.c
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@@ -2,7 +2,6 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/crc7.h>
#include <linux/etherdevice.h>
#include "wl1251.h"

3
drivers/net/wireless/ti/wl1251/spi.c
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@@ -122,8 +122,7 @@ static void wl1251_spi_wake(struct wl1251 *wl)
crc[3] = cmd[6];
crc[4] = cmd[5];
cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
cmd[4] |= WSPI_INIT_CMD_END;
cmd[4] = crc7_be(0, crc, WSPI_INIT_CMD_CRC_LEN) | WSPI_INIT_CMD_END;
t.tx_buf = cmd;
t.len = WSPI_INIT_CMD_LEN;

3
drivers/net/wireless/ti/wlcore/spi.c
View File

@@ -151,8 +151,7 @@ static void wl12xx_spi_init(struct device *child)
crc[3] = cmd[6];
crc[4] = cmd[5];
cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
cmd[4] |= WSPI_INIT_CMD_END;
cmd[4] = crc7_be(0, crc, WSPI_INIT_CMD_CRC_LEN) | WSPI_INIT_CMD_END;
t.tx_buf = cmd;
t.len = WSPI_INIT_CMD_LEN;