Patch "ice: reconfig host after changing MSI-X on VF" has been added to the 6.7-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    ice: reconfig host after changing MSI-X on VF

to the 6.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ice-reconfig-host-after-changing-msi-x-on-vf.patch
and it can be found in the queue-6.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit e7ab55ab02ec6a922224370267537d40f10a81b3
Author: Michal Swiatkowski <michal.swiatkowski@xxxxxxxxxxxxxxx>
Date:   Fri Feb 23 07:40:24 2024 +0100

    ice: reconfig host after changing MSI-X on VF
    
    [ Upstream commit 4035c72dc1ba81a96f94de84dfd5409056c1d9c9 ]
    
    During VSI reconfiguration filters and VSI config which is set in
    ice_vf_init_host_cfg() are lost. Recall the host configuration function
    to restore them.
    
    Without this config VF on which MSI-X amount was changed might had a
    connection problems.
    
    Fixes: 4d38cb44bd32 ("ice: manage VFs MSI-X using resource tracking")
    Reviewed-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
    Signed-off-by: Michal Swiatkowski <michal.swiatkowski@xxxxxxxxxxxxxxx>
    Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
    Tested-by: Rafal Romanowski <rafal.romanowski@xxxxxxxxx>
    Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/intel/ice/ice_sriov.c b/drivers/net/ethernet/intel/ice/ice_sriov.c
index c4caa9df473b5..cd61928700211 100644
--- a/drivers/net/ethernet/intel/ice/ice_sriov.c
+++ b/drivers/net/ethernet/intel/ice/ice_sriov.c
@@ -1074,6 +1074,7 @@ int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)
 	struct ice_pf *pf = pci_get_drvdata(pdev);
 	u16 prev_msix, prev_queues, queues;
 	bool needs_rebuild = false;
+	struct ice_vsi *vsi;
 	struct ice_vf *vf;
 	int id;
 
@@ -1108,6 +1109,10 @@ int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)
 	if (!vf)
 		return -ENOENT;
 
+	vsi = ice_get_vf_vsi(vf);
+	if (!vsi)
+		return -ENOENT;
+
 	prev_msix = vf->num_msix;
 	prev_queues = vf->num_vf_qs;
 
@@ -1128,7 +1133,7 @@ int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)
 	if (vf->first_vector_idx < 0)
 		goto unroll;
 
-	if (ice_vf_reconfig_vsi(vf)) {
+	if (ice_vf_reconfig_vsi(vf) || ice_vf_init_host_cfg(vf, vsi)) {
 		/* Try to rebuild with previous values */
 		needs_rebuild = true;
 		goto unroll;
@@ -1154,8 +1159,10 @@ int ice_sriov_set_msix_vec_count(struct pci_dev *vf_dev, int msix_vec_count)
 	if (vf->first_vector_idx < 0)
 		return -EINVAL;
 
-	if (needs_rebuild)
+	if (needs_rebuild) {
 		ice_vf_reconfig_vsi(vf);
+		ice_vf_init_host_cfg(vf, vsi);
+	}
 
 	ice_ena_vf_mappings(vf);
 	ice_put_vf(vf);