]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
igb: fix bit_shift to be in [1..8] range
authorAleksandr Loktionov <aleksandr.loktionov@intel.com>
Tue, 16 May 2023 17:41:46 +0000 (10:41 -0700)
committerDavid S. Miller <davem@davemloft.net>
Wed, 17 May 2023 08:25:04 +0000 (09:25 +0100)
commit60d758659f1fb49e0d5b6ac2691ede8c0958795b
treeb737d1b4cac4f8270fcc6650e23042c9e8c1a4f4
parent5ad3bd8444021a227959891c14b436e4067d67fd
igb: fix bit_shift to be in [1..8] range

In igb_hash_mc_addr() the expression:
        "mc_addr[4] >> 8 - bit_shift", right shifting "mc_addr[4]"
shift by more than 7 bits always yields zero, so hash becomes not so different.
Add initialization with bit_shift = 1 and add a loop condition to ensure
bit_shift will be always in [1..8] range.

Fixes: 9d5c824399de ("igb: PCI-Express 82575 Gigabit Ethernet driver")
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/intel/igb/e1000_mac.c