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net: ethernet: fs-enet: Use generic CRC32 implementation 

Use generic kernel CRC32 implementation because it:
1. Should be faster (uses lookup tables),
2. Removes duplicated CRC generation code,
3. Uses well-proven algorithm instead of coding it one more time.

Suggested-by: Eric Biggers <ebiggers3@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Krzysztof Kozlowski 2018-07-23 18:20:20 +02:00 committed by David S. Miller
parent 16f6e9835b
commit d805f6a868
1 changed files with 3 additions and 13 deletions
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16
drivers/net/ethernet/freescale/fs_enet/mac-fec.c
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@ -18,6 +18,7 @@
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/crc32.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
@ -176,21 +177,10 @@ static void set_multicast_start(struct net_device *dev)
static void set_multicast_one(struct net_device *dev, const u8 *mac)
{
struct fs_enet_private *fep = netdev_priv(dev);
int temp, hash_index, i, j;
int temp, hash_index;
u32 crc, csrVal;
u8 byte, msb;
crc = 0xffffffff;
for (i = 0; i < 6; i++) {
byte = mac[i];
for (j = 0; j < 8; j++) {
msb = crc >> 31;
crc <<= 1;
if (msb ^ (byte & 0x1))
crc ^= FEC_CRC_POLY;
byte >>= 1;
}
}
crc = ether_crc(6, mac);
temp = (crc & 0x3f) >> 1;
hash_index = ((temp & 0x01) << 4) |