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i40e: Fix for trace found with S4 state

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This patch fixes a problem found in systems when entering
S4 state.  This patch fixes the problem by ensuring that
the misc vector's IRQ is disabled as well.  Without this
patch a stack trace can be seen upon entering S4 state.

Signed-off-by: Carolyn Wyborny <carolyn.wyborny@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:
Carolyn Wyborny 2017-06-20 15:16:53 -07:00 committed by Jeff Kirsher
parent db1a8f8e83
commit 7c9ae7f053
1 changed files with 13 additions and 1 deletions
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14
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -12089,7 +12089,10 @@ static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
i40e_stop_misc_vector(pf);
if (pf->msix_entries) {
synchronize_irq(pf->msix_entries[0].vector);
free_irq(pf->msix_entries[0].vector, pf);
}
retval = pci_save_state(pdev);
if (retval)
return retval;
@ -12129,6 +12132,15 @@ static int i40e_resume(struct pci_dev *pdev)
/* handling the reset will rebuild the device state */
if (test_and_clear_bit(__I40E_SUSPENDED, pf->state)) {
clear_bit(__I40E_DOWN, pf->state);
if (pf->msix_entries) {
err = request_irq(pf->msix_entries[0].vector,
i40e_intr, 0, pf->int_name, pf);
if (err) {
dev_err(&pf->pdev->dev,
"request_irq for %s failed: %d\n",
pf->int_name, err);
}
}
i40e_reset_and_rebuild(pf, false, false);
}