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e1000e: use either_crc_le() rather than re-write it

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For the 82579 jumbo frame workaround, there is no need to re-write the CRC
calculation functionality already found in the kernel's ether_crc_le().

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bruce Allan 2011-01-06 14:29:51 +00:00 committed by David S. Miller
parent e0dc4f1254
commit fe46f58fa6
2 changed files with 2 additions and 18 deletions
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1
drivers/net/e1000e/e1000.h
View File

@ -38,6 +38,7 @@
#include <linux/netdevice.h>
#include <linux/pci.h>
#include <linux/pci-aspm.h>
#include <linux/crc32.h>
#include "hw.h"

19
drivers/net/e1000e/ich8lan.c
View File

@ -1395,22 +1395,6 @@ void e1000_copy_rx_addrs_to_phy_ich8lan(struct e1000_hw *hw)
}
}
static u32 e1000_calc_rx_da_crc(u8 mac[])
{
u32 poly = 0xEDB88320; /* Polynomial for 802.3 CRC calculation */
u32 i, j, mask, crc;
crc = 0xffffffff;
for (i = 0; i < 6; i++) {
crc = crc ^ mac[i];
for (j = 8; j > 0; j--) {
mask = (crc & 1) * (-1);
crc = (crc >> 1) ^ (poly & mask);
}
}
return ~crc;
}
/**
* e1000_lv_jumbo_workaround_ich8lan - required for jumbo frame operation
* with 82579 PHY
@ -1453,8 +1437,7 @@ s32 e1000_lv_jumbo_workaround_ich8lan(struct e1000_hw *hw, bool enable)
mac_addr[4] = (addr_high & 0xFF);
mac_addr[5] = ((addr_high >> 8) & 0xFF);
ew32(PCH_RAICC(i),
e1000_calc_rx_da_crc(mac_addr));
ew32(PCH_RAICC(i), ~ether_crc_le(ETH_ALEN, mac_addr));
}
/* Write Rx addresses to the PHY */