net: Fix Tx hash bound checking
authorAmritha Nambiar <amritha.nambiar@intel.com>
Mon, 24 Feb 2020 18:56:00 +0000 (10:56 -0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 26 Feb 2020 19:14:10 +0000 (11:14 -0800)
commit6e11d1578fba8d09d03a286740ffcf336d53928c
tree28dd117c6d920b22221c937220d1b10ce734d2b4
parenta8e41f6033a0c5633d55d6e35993c9e2005d872f
net: Fix Tx hash bound checking

Fixes the lower and upper bounds when there are multiple TCs and
traffic is on the the same TC on the same device.

The lower bound is represented by 'qoffset' and the upper limit for
hash value is 'qcount + qoffset'. This gives a clean Rx to Tx queue
mapping when there are multiple TCs, as the queue indices for upper TCs
will be offset by 'qoffset'.

v2: Fixed commit description based on comments.

Fixes: 1b837d489e06 ("net: Revoke export for __skb_tx_hash, update it to just be static skb_tx_hash")
Fixes: eadec877ce9c ("net: Add support for subordinate traffic classes to netdev_pick_tx")
Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Reviewed-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/core/dev.c