[PATCH AUTOSEL for 4.9 048/219] qed: Always publish VF link from leading hwfn

[Sasha Levin]

From: "Mintz, Yuval" <yuval.mi...@cavium.com>

[ Upstream commit e50728effe1126eae39445ba144078b1305b7047 ]

The link information exists only on the leading hwfn,
but some of its derivatives [e.g., min/max rate] need to
be configured for each hwfn.
When re-basing the VF link view, use the leading hwfn
information as basis for all existing hwfns to allow
said configurations to stick.

Signed-off-by: Yuval Mintz <yuval.mi...@cavium.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 drivers/net/ethernet/qlogic/qed/qed_sriov.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_sriov.c 
b/drivers/net/ethernet/qlogic/qed/qed_sriov.c
index d2d6621fe0e5..48bc5c151336 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_sriov.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_sriov.c
@@ -3573,6 +3573,7 @@ static int qed_get_vf_config(struct qed_dev *cdev,
 
 void qed_inform_vf_link_state(struct qed_hwfn *hwfn)
 {
+       struct qed_hwfn *lead_hwfn = QED_LEADING_HWFN(hwfn->cdev);
        struct qed_mcp_link_capabilities caps;
        struct qed_mcp_link_params params;
        struct qed_mcp_link_state link;
@@ -3589,9 +3590,15 @@ void qed_inform_vf_link_state(struct qed_hwfn *hwfn)
                if (!vf_info)
                        continue;
 
-               memcpy(&params, qed_mcp_get_link_params(hwfn), sizeof(params));
-               memcpy(&link, qed_mcp_get_link_state(hwfn), sizeof(link));
-               memcpy(&caps, qed_mcp_get_link_capabilities(hwfn),
+               /* Only hwfn0 is actually interested in the link speed.
+                * But since only it would receive an MFW indication of link,
+                * need to take configuration from it - otherwise things like
+                * rate limiting for hwfn1 VF would not work.
+                */
+               memcpy(&params, qed_mcp_get_link_params(lead_hwfn),
+                      sizeof(params));
+               memcpy(&link, qed_mcp_get_link_state(lead_hwfn), sizeof(link));
+               memcpy(&caps, qed_mcp_get_link_capabilities(lead_hwfn),
                       sizeof(caps));
 
                /* Modify link according to the VF's configured link state */
-- 
2.14.1