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i40e: Clean up MSIX IRQs before suspend

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The i40e_suspend() function calls another function that preps the device
for the power save and resume by freeing all the Tx/Rx resources and
interrupts but that function does not free the "other" causes interrupt
vector and IRQ. It also fails to call synchronize_irq() before freeing
the IRQ vectors.  This sometimes may result in some AER errors on those
systems with that PCIe error reporting feature enabled.

Call synchronize_irq() before freeing IRQ vectors and explicitly free
the other causes interrupt resources and shut down that MSIX interrupt.

Change-ID: Ib88e4536756518a352446da0232189716618ad81
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Greg Rose 2016-05-16 10:26:37 -07:00 committed by Jeff Kirsher
parent 0e8d95f896
commit b33d3b7321
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -3950,6 +3950,7 @@ static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
/* clear the affinity_mask in the IRQ descriptor */
irq_set_affinity_hint(pf->msix_entries[vector].vector,
NULL);
synchronize_irq(pf->msix_entries[vector].vector);
free_irq(pf->msix_entries[vector].vector,
vsi->q_vectors[i]);
@ -11451,6 +11452,8 @@ static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
i40e_stop_misc_vector(pf);
pci_wake_from_d3(pdev, pf->wol_en);
pci_set_power_state(pdev, PCI_D3hot);