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Commit 7e3f5c88 authored by Emil Tantilov's avatar Emil Tantilov Committed by Jeff Kirsher
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ixgbe: fix bounds checking in ixgbe_setup_tc for 82598 



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

Reported-by: default avatarTal Abudi <talabudi@gmail.com>
Signed-off-by: default avatarEmil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 1c7cf078

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

+4 −3
Original line number Diff line number Diff line
@@ -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);