[PATCH net 1/2] bnxt_en: Fix ring arithmetic in bnxt_setup_tc().

[Michael Chan]

The logic is missing the check on whether the tx and rx rings are sharing
completion rings or not.

Signed-off-by: Michael Chan <michael.c...@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c 
b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index a9f9f37..c690966 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6309,6 +6309,7 @@ static int bnxt_setup_tc(struct net_device *dev, u32 
handle, __be16 proto,
                         struct tc_to_netdev *ntc)
 {
        struct bnxt *bp = netdev_priv(dev);
+       bool sh = false;
        u8 tc;
 
        if (ntc->type != TC_SETUP_MQPRIO)
@@ -6325,12 +6326,11 @@ static int bnxt_setup_tc(struct net_device *dev, u32 
handle, __be16 proto,
        if (netdev_get_num_tc(dev) == tc)
                return 0;
 
+       if (bp->flags & BNXT_FLAG_SHARED_RINGS)
+               sh = true;
+
        if (tc) {
                int max_rx_rings, max_tx_rings, rc;
-               bool sh = false;
-
-               if (bp->flags & BNXT_FLAG_SHARED_RINGS)
-                       sh = true;
 
                rc = bnxt_get_max_rings(bp, &max_rx_rings, &max_tx_rings, sh);
                if (rc || bp->tx_nr_rings_per_tc * tc > max_tx_rings)
@@ -6348,7 +6348,8 @@ static int bnxt_setup_tc(struct net_device *dev, u32 
handle, __be16 proto,
                bp->tx_nr_rings = bp->tx_nr_rings_per_tc;
                netdev_reset_tc(dev);
        }
-       bp->cp_nr_rings = max_t(int, bp->tx_nr_rings, bp->rx_nr_rings);
+       bp->cp_nr_rings = sh ? max_t(int, bp->tx_nr_rings, bp->rx_nr_rings) :
+                              bp->tx_nr_rings + bp->rx_nr_rings;
        bp->num_stat_ctxs = bp->cp_nr_rings;
 
        if (netif_running(bp->dev))
-- 
1.8.3.1