diff options
| author | Peter Korsgaard <jacmet@sunsite.dk> | 2007-11-22 12:25:13 +0100 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-11-23 22:09:01 -0500 |
| commit | 7b31f7ffa9ed7ba5fbe1cab8fb17a8c545e6a0eb (patch) | |
| tree | 9851d34e83934a685ddf70f65c4ba17be7cf80e9 /drivers/net/smc911x.c | |
| parent | 8b31cfbcd1b54362ef06c85beb40e65a349169a2 (diff) | |
smc911x: Fix multicast handling
smc911x_set_multicast_list fails to fill out the multicast hash table
correctly; Bit 1 was used rather than bit 5 to decide if the lower or
upper register should be used.
The function is at the same time cleaned up by calling ether_crc rather
than using it's own bit reversal table.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/smc911x.c')
| -rw-r--r-- | drivers/net/smc911x.c | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/drivers/net/smc911x.c b/drivers/net/smc911x.c index 69a78b325767..1a3d80bfe9ea 100644 --- a/drivers/net/smc911x.c +++ b/drivers/net/smc911x.c @@ -1379,13 +1379,6 @@ static void smc911x_set_multicast_list(struct net_device *dev) unsigned int multicast_table[2]; unsigned int mcr, update_multicast = 0; unsigned long flags; - /* table for flipping the order of 5 bits */ - static const unsigned char invert5[] = - {0x00, 0x10, 0x08, 0x18, 0x04, 0x14, 0x0C, 0x1C, - 0x02, 0x12, 0x0A, 0x1A, 0x06, 0x16, 0x0E, 0x1E, - 0x01, 0x11, 0x09, 0x19, 0x05, 0x15, 0x0D, 0x1D, - 0x03, 0x13, 0x0B, 0x1B, 0x07, 0x17, 0x0F, 0x1F}; - DBG(SMC_DEBUG_FUNC, "%s: --> %s\n", dev->name, __FUNCTION__); @@ -1432,7 +1425,7 @@ static void smc911x_set_multicast_list(struct net_device *dev) cur_addr = dev->mc_list; for (i = 0; i < dev->mc_count; i++, cur_addr = cur_addr->next) { - int position; + u32 position; /* do we have a pointer here? */ if (!cur_addr) @@ -1442,12 +1435,10 @@ static void smc911x_set_multicast_list(struct net_device *dev) if (!(*cur_addr->dmi_addr & 1)) continue; - /* only use the low order bits */ - position = crc32_le(~0, cur_addr->dmi_addr, 6) & 0x3f; + /* upper 6 bits are used as hash index */ + position = ether_crc(ETH_ALEN, cur_addr->dmi_addr)>>26; - /* do some messy swapping to put the bit in the right spot */ - multicast_table[invert5[position&0x1F]&0x1] |= - (1<<invert5[(position>>1)&0x1F]); + multicast_table[position>>5] |= 1 << (position&0x1f); } /* be sure I get rid of flags I might have set */ |