bnxt_en: Do not enable legacy TX push on older firmware.

Older firmware may not support legacy TX push properly and may not
be disabling it.  So we check certain firmware versions that may
have this problem and disable legacy TX push unconditionally.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Reviewed-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 0ad8d49..f8c50b1 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6976,7 +6976,8 @@ static int __bnxt_hwrm_func_qcaps(struct bnxt *bp)
                bp->fw_cap |= BNXT_FW_CAP_ERR_RECOVER_RELOAD;
 
        bp->tx_push_thresh = 0;
-       if (flags & FUNC_QCAPS_RESP_FLAGS_PUSH_MODE_SUPPORTED)
+       if ((flags & FUNC_QCAPS_RESP_FLAGS_PUSH_MODE_SUPPORTED) &&
+           BNXT_FW_MAJ(bp) > 217)
                bp->tx_push_thresh = BNXT_TX_PUSH_THRESH;
 
        hw_resc->max_rsscos_ctxs = le16_to_cpu(resp->max_rsscos_ctx);

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 858440e..78e2fd6 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1749,6 +1749,7 @@ struct bnxt {
        u64                     fw_ver_code;
 #define BNXT_FW_VER_CODE(maj, min, bld, rsv)                   \
        ((u64)(maj) << 48 | (u64)(min) << 32 | (u64)(bld) << 16 | (rsv))
+#define BNXT_FW_MAJ(bp)                ((bp)->fw_ver_code >> 48)
 
        __be16                  vxlan_port;
        u8                      vxlan_port_cnt;