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: 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>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index afdc7fb..0853cf0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -7848,9 +7848,10 @@
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);