bnxt_en: Reset device on RX buffer errors.

[ Upstream commit 8e44e96c6c8e8fb80b84a2ca11798a8554f710f2 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 1e5498431618d1d81533e5c317655cad196501fa..446577a1a6a593b0f98e544ac12ecfa409762b26 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1557,11 +1557,17 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_napi *bnapi, u32 *raw_cons,
 
        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(bnapi, 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;
        }