i40e: Close client on suspend and restore client MSIx on resume

During suspend client MSIx vectors are freed while they are still
in use causing a crash on entering S3.

Fix this calling client close before freeing up its MSIx vectors.
Also update the client MSIx vectors on resume before client
open is called.

Fixes commit 51326ee3b393 ("i40e: shutdown all IRQs and disable MSI-X
when suspended")

Reported-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 36d9401a62589b894471ace383320041af4a0abf..271ab1a861b782fedc3984442b0028d162d8f8c7 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -1041,6 +1041,7 @@ void i40e_notify_client_of_l2_param_changes(struct i40e_vsi *vsi);
 void i40e_notify_client_of_netdev_close(struct i40e_vsi *vsi, bool reset);
 void i40e_notify_client_of_vf_enable(struct i40e_pf *pf, u32 num_vfs);
 void i40e_notify_client_of_vf_reset(struct i40e_pf *pf, u32 vf_id);
+void i40e_client_update_msix_info(struct i40e_pf *pf);
 int i40e_vf_client_capable(struct i40e_pf *pf, u32 vf_id);
 /**
  * i40e_irq_dynamic_enable - Enable default interrupt generation settings

diff --git a/drivers/net/ethernet/intel/i40e/i40e_client.c b/drivers/net/ethernet/intel/i40e/i40e_client.c
index 0de9610c1d8db1e95250f51f1987a7d6608699d9..704695a61645cd53cec5db7cb5b43eff3de55ece 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_client.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_client.c
@@ -287,6 +287,17 @@ out:
        return capable;
 }
 
+void i40e_client_update_msix_info(struct i40e_pf *pf)
+{
+       struct i40e_client_instance *cdev = pf->cinst;
+
+       if (!cdev || !cdev->client)
+               return;
+
+       cdev->lan_info.msix_count = pf->num_iwarp_msix;
+       cdev->lan_info.msix_entries = &pf->msix_entries[pf->iwarp_base_vector];
+}
+
 /**
  * i40e_client_add_instance - add a client instance struct to the instance list
  * @pf: pointer to the board struct
@@ -328,9 +339,6 @@ static void i40e_client_add_instance(struct i40e_pf *pf)
                return;
        }
 
-       cdev->lan_info.msix_count = pf->num_iwarp_msix;
-       cdev->lan_info.msix_entries = &pf->msix_entries[pf->iwarp_base_vector];
-
        mac = list_first_entry(&cdev->lan_info.netdev->dev_addrs.list,
                               struct netdev_hw_addr, list);
        if (mac)
@@ -340,6 +348,8 @@ static void i40e_client_add_instance(struct i40e_pf *pf)
 
        cdev->client = registered_client;
        pf->cinst = cdev;
+
+       i40e_client_update_msix_info(pf);
 }
 
 /**

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index b78c06a1f82ce96b3de3480f12bbf413574927b6..4a4401c6108948d5b72c0c0ff002c59b1221eeb9 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -10594,6 +10594,9 @@ static int i40e_restore_interrupt_scheme(struct i40e_pf *pf)
        if (err)
                goto err_unwind;
 
+       if (pf->flags & I40E_FLAG_IWARP_ENABLED)
+               i40e_client_update_msix_info(pf);
+
        return 0;
 
 err_unwind:
@@ -14344,6 +14347,11 @@ static int __maybe_unused i40e_suspend(struct device *dev)
        del_timer_sync(&pf->service_timer);
        cancel_work_sync(&pf->service_task);
 
+       /* Client close must be called explicitly here because the timer
+        * has been stopped.
+        */
+       i40e_notify_client_of_netdev_close(pf->vsi[pf->lan_vsi], false);
+
        if (pf->wol_en && (pf->hw_features & I40E_HW_WOL_MC_MAGIC_PKT_WAKE))
                i40e_enable_mc_magic_wake(pf);