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bnxt_en: Fix ethtool self-test loopback.

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The current code has 2 problems.  It assumes that the RX ring for
the loopback packet is combined with the TX ring.  This is not
true if the ethtool channels are set to non-combined mode.  The
second problem is that it won't work on 57500 chips without
adjusting the logic to get the proper completion ring (cpr) pointer.
Fix both issues by locating the proper cpr pointer through the RX
ring.

Fixes: e44758b78a ("bnxt_en: Use bnxt_cp_ring_info struct pointer as parameter for RX path.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan 2018-12-19 13:46:50 -05:00 committed by David S. Miller
parent 912cb1d55c
commit 84404d5fd5
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
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@ -2572,6 +2572,7 @@ static int bnxt_poll_loopback(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
static int bnxt_run_loopback(struct bnxt *bp)
{
struct bnxt_tx_ring_info *txr = &bp->tx_ring[0];
struct bnxt_rx_ring_info *rxr = &bp->rx_ring[0];
struct bnxt_cp_ring_info *cpr;
int pkt_size, i = 0;
struct sk_buff *skb;
@ -2579,7 +2580,9 @@ static int bnxt_run_loopback(struct bnxt *bp)
u8 *data;
int rc;
cpr = &txr->bnapi->cp_ring;
cpr = &rxr->bnapi->cp_ring;
if (bp->flags & BNXT_FLAG_CHIP_P5)
cpr = cpr->cp_ring_arr[BNXT_RX_HDL];
pkt_size = min(bp->dev->mtu + ETH_HLEN, bp->rx_copy_thresh);
skb = netdev_alloc_skb(bp->dev, pkt_size);
if (!skb)