[PATCH net 2/3] qed: Fix possible race for the link state value.

[Sudarsana Reddy Kalluru]

There's a possible race where driver can read link status in mid-transition
and see that virtual-link is up yet speed is 0. Since in this
mid-transition we're guaranteed to see a mailbox from MFW soon, we can
afford to treat this as link down.

Fixes: cc875c2e ("qed: Add link support")
Signed-off-by: Sudarsana Reddy Kalluru <sudarsana.kall...@cavium.com>
Signed-off-by: Ariel Elior <ariel.el...@cavium.com>
Signed-off-by: Michal Kalderon <michal.kalde...@cavium.com>
---
 drivers/net/ethernet/qlogic/qed/qed_mcp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_mcp.c 
b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
index fcd3466..1a12093 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
@@ -1208,6 +1208,7 @@ static void qed_mcp_handle_link_change(struct qed_hwfn 
*p_hwfn,
                break;
        default:
                p_link->speed = 0;
+               p_link->link_up = 0;
        }
 
        if (p_link->link_up && p_link->speed)
-- 
1.8.3.1