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igb: clean up code for setting MAC address 

Drop a bunch of hand written byte swapping code in favor of just doing the
byte swapping ourselves.  The registers are little endian registers storing
a big endian value so if we read the MAC address array as little endian
then we will get the CPU registers into the proper layout.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alexander Duyck 2016-01-06 23:10:23 -08:00 committed by Jeff Kirsher
parent 9ce0e8d726
commit c3278587e7
1 changed files with 4 additions and 5 deletions
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9
drivers/net/ethernet/intel/igb/igb_main.c
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@ -7698,15 +7698,14 @@ static void igb_io_resume(struct pci_dev *pdev)
static void igb_rar_set_qsel(struct igb_adapter *adapter, u8 *addr, u32 index,
u8 qsel)
{
u32 rar_low, rar_high;
struct e1000_hw *hw = &adapter->hw;
u32 rar_low, rar_high;
/* HW expects these in little endian so we reverse the byte order
* from network order (big endian) to little endian
* from network order (big endian) to CPU endian
*/
rar_low = ((u32) addr[0] | ((u32) addr[1] << 8) |
((u32) addr[2] << 16) | ((u32) addr[3] << 24));
rar_high = ((u32) addr[4] | ((u32) addr[5] << 8));
rar_low = le32_to_cpup((__be32 *)(addr));
rar_high = le16_to_cpup((__be16 *)(addr + 4));
/* Indicate to hardware the Address is Valid. */
rar_high |= E1000_RAH_AV;