[Intel-wired-lan] [next PATCH S88 3/8] i40e: Close client on suspend and restore client MSIx on resume

Alice Michael alice.michael at intel.com
Mon Mar 12 14:00:17 UTC 2018


From: Shiraz Saleem <shiraz.saleem at intel.com>

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 b980c0634fe5 ("i40e: shutdown all IRQs and disable MSI-X
when suspended")

Reported-by: Stefan Assmann <sassmann at redhat.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem at intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e.h        |  1 +
 drivers/net/ethernet/intel/i40e/i40e_client.c | 16 +++++++++++++---
 drivers/net/ethernet/intel/i40e/i40e_main.c   |  8 ++++++++
 3 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index 956299c..1e1cd52 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -1042,6 +1042,7 @@ 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 0680a62..a04bbfc 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_client.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_client.c
@@ -288,6 +288,17 @@ int i40e_vf_client_capable(struct i40e_pf *pf, u32 vf_id)
 	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
@@ -329,9 +340,6 @@ 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)
@@ -341,6 +349,8 @@ 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 0df21e4..5a77dbf 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -10595,6 +10595,9 @@ 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:
@@ -14345,6 +14348,11 @@ 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);
 
-- 
2.9.5



More information about the Intel-wired-lan mailing list