[PATCH 4.9 046/241] qed: Always publish VF link from leading hwfn

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Mintz, Yuval" <Yuval.Mintz@xxxxxxxxxx>


[ 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.Mintz@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/qlogic/qed/qed_sriov.c |   13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

--- 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_
 
 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
 		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 */