bnxt_en: init RSS table for Minimal-Static VF reservation

There are no VF rings available during probe when the device is configured
using the Minimal-Static reservation strategy. In this case, the RSS
indirection table can only be initialized later, during bnxt_open_nic().
However, this was not happening because the rings will already have been
reserved via bnxt_init_dflt_ring_mode(), causing bnxt_need_reserve_rings()
to return false in bnxt_reserve_rings() and bypass the RSS table init.

Solve this by pushing the call to bnxt_set_dflt_rss_indir_tbl() into
__bnxt_reserve_rings(), which is common to both paths and is called
whenever ring configuration is changed. After doing this, the RSS table
init that must be called from bnxt_init_one() happens implicitly via
bnxt_set_default_rings(), necessitating doing the allocation earlier in
order to avoid a null pointer dereference.

Fixes: bd3191b5d87d ("bnxt_en: Implement ethtool -X to set indirection table.")
Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index a23ccb0..27df572 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6219,6 +6219,9 @@ static int __bnxt_reserve_rings(struct bnxt *bp)
        if (!tx || !rx || !cp || !grp || !vnic || !stat)
                return -ENOMEM;
 
+       if (!netif_is_rxfh_configured(bp->dev))
+               bnxt_set_dflt_rss_indir_tbl(bp);
+
        return rc;
 }
 
@@ -8500,9 +8503,6 @@ int bnxt_reserve_rings(struct bnxt *bp, bool irq_re_init)
                        rc = bnxt_init_int_mode(bp);
                bnxt_ulp_irq_restart(bp, rc);
        }
-       if (!netif_is_rxfh_configured(bp->dev))
-               bnxt_set_dflt_rss_indir_tbl(bp);
-
        if (rc) {
                netdev_err(bp->dev, "ring reservation/IRQ init failure rc: %d\n", rc);
                return rc;
@@ -12209,6 +12209,10 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
        if (BNXT_CHIP_P5(bp))
                bp->flags |= BNXT_FLAG_CHIP_P5;
 
+       rc = bnxt_alloc_rss_indir_tbl(bp);
+       if (rc)
+               goto init_err_pci_clean;
+
        rc = bnxt_fw_init_one_p2(bp);
        if (rc)
                goto init_err_pci_clean;
@@ -12313,11 +12317,6 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
         */
        bp->tx_nr_rings_per_tc = bp->tx_nr_rings;
 
-       rc = bnxt_alloc_rss_indir_tbl(bp);
-       if (rc)
-               goto init_err_pci_clean;
-       bnxt_set_dflt_rss_indir_tbl(bp);
-
        if (BNXT_PF(bp)) {
                if (!bnxt_pf_wq) {
                        bnxt_pf_wq =