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smc911x: Fix multicast handling

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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>
This commit is contained in:
Peter Korsgaard 2007-11-22 12:25:13 +01:00 committed by Jeff Garzik
parent 8b31cfbcd1
commit 7b31f7ffa9
1 changed files with 4 additions and 13 deletions
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17
drivers/net/smc911x.c
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@ -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 */