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>
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@ -18,6 +18,7 @@
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/ptrace.h>
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#include <linux/ptrace.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/crc32.h>
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#include <linux/ioport.h>
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/delay.h>
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@ -176,21 +177,10 @@ static void set_multicast_start(struct net_device *dev)
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static void set_multicast_one(struct net_device *dev, const u8 *mac)
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static void set_multicast_one(struct net_device *dev, const u8 *mac)
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{
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{
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struct fs_enet_private *fep = netdev_priv(dev);
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struct fs_enet_private *fep = netdev_priv(dev);
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int temp, hash_index, i, j;
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int temp, hash_index;
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u32 crc, csrVal;
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u32 crc, csrVal;
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u8 byte, msb;
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crc = 0xffffffff;
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crc = ether_crc(6, mac);
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for (i = 0; i < 6; i++) {
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byte = mac[i];
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for (j = 0; j < 8; j++) {
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msb = crc >> 31;
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crc <<= 1;
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if (msb ^ (byte & 0x1))
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crc ^= FEC_CRC_POLY;
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byte >>= 1;
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}
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}
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temp = (crc & 0x3f) >> 1;
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temp = (crc & 0x3f) >> 1;
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hash_index = ((temp & 0x01) << 4) |
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hash_index = ((temp & 0x01) << 4) |
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