From: Scott Bauer <scott.bauer@intel.com>
Date: Fri, 11 Aug 2017 14:54:32 -0600
Subject: PCI: vmd: Free up IRQs on suspend path
Patch-mainline: v4.14-rc1
Git-commit: e2b1820bd5d0962d6f271b0d47c3a0e38647df2f
References: bsc#1067483

Free up the IRQs we request on the suspend path and reallocate them on the
resume path.

Fixes this error:

  CPU 111 disable failed: CPU has 9 vectors assigned and there are only 0 available.
  Error taking CPU111 down: -34
  Non-boot CPUs are not disabled
  Enabling non-boot CPUs ...

Signed-off-by: Scott Bauer <scott.bauer@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Keith Busch <keith.busch@intel.com>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
---
 drivers/pci/host/vmd.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/pci/host/vmd.c b/drivers/pci/host/vmd.c
index 7e967a8784b2..4fe1756af010 100644
--- a/drivers/pci/host/vmd.c
+++ b/drivers/pci/host/vmd.c
@@ -763,6 +763,11 @@ static void vmd_remove(struct pci_dev *dev)
 static int vmd_suspend(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
+	struct vmd_dev *vmd = pci_get_drvdata(pdev);
+	int i;
+
+	for (i = 0; i < vmd->msix_count; i++)
+                devm_free_irq(dev, pci_irq_vector(pdev, i), &vmd->irqs[i]);
 
 	pci_save_state(pdev);
 	return 0;
@@ -771,6 +776,16 @@ static int vmd_suspend(struct device *dev)
 static int vmd_resume(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
+	struct vmd_dev *vmd = pci_get_drvdata(pdev);
+	int err, i;
+
+	for (i = 0; i < vmd->msix_count; i++) {
+		err = devm_request_irq(dev, pci_irq_vector(pdev, i),
+				       vmd_irq, IRQF_NO_THREAD,
+				       "vmd", &vmd->irqs[i]);
+		if (err)
+			return err;
+	}
 
 	pci_restore_state(pdev);
 	return 0;
-- 
2.12.3