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ixgbe: fix bounds checking in ixgbe_setup_tc for 82598

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This patch resolves an issue where users were not able to dynamically
set number of queues for 82598 via ethtool -L

Reported-by: Tal Abudi <talabudi@gmail.com>
Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Emil Tantilov 2015-07-09 12:28:59 -07:00 committed by Jeff Kirsher
parent 1c7cf0784e
commit 7e3f5c8881
1 changed files with 4 additions and 3 deletions
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7
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@ -7848,9 +7848,10 @@ int ixgbe_setup_tc(struct net_device *dev, u8 tc)
bool pools;
/* Hardware supports up to 8 traffic classes */
if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
(hw->mac.type == ixgbe_mac_82598EB &&
tc < MAX_TRAFFIC_CLASS))
if (tc > adapter->dcb_cfg.num_tcs.pg_tcs)
return -EINVAL;
if (hw->mac.type == ixgbe_mac_82598EB && tc && tc < MAX_TRAFFIC_CLASS)
return -EINVAL;
pools = (find_first_zero_bit(&adapter->fwd_bitmask, 32) > 1);