bnxt_en: Reset device on RX buffer errors.

If the RX completion indicates RX buffers errors, the RX ring will be
disabled by firmware and no packets will be received on that ring from
that point on.  Recover by resetting the device.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 3df847b7079f..4c586ba4364b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1614,11 +1614,17 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 
         rx_buf->data = NULL;
         if (rxcmp1->rx_cmp_cfa_code_errors_v2 & RX_CMP_L2_ERRORS) {
+                u32 rx_err = le32_to_cpu(rxcmp1->rx_cmp_cfa_code_errors_v2);
+
                 bnxt_reuse_rx_data(rxr, cons, data);
                 if (agg_bufs)
                         bnxt_reuse_rx_agg_bufs(cpr, cp_cons, agg_bufs);
 
                 rc = -EIO;
+                if (rx_err & RX_CMPL_ERRORS_BUFFER_ERROR_MASK) {
+                        netdev_warn(bp->dev, "RX buffer error %x\n", rx_err);
+                        bnxt_sched_reset(bp, rxr);
+                }
                 goto next_rx;
         }