[PATCH] PCI: vmd: Free up IRQs on suspend path

[Scott Bauer <scott.bauer@intel.com>]

This patch frees up the IRQs we request on the suspend path,
and reallocates them on the resume path.

Fixes:
[  559.964386] CPU 111 disable failed: CPU has 9 vectors assigned and there are only 0 available.
[  559.966824] Error taking CPU111 down: -34
[  559.966825] Non-boot CPUs are not disabled
[  559.966826] Enabling non-boot CPUs ...

Signed-off-by: Scott Bauer <scott.bauer@intel.com>
---
 drivers/pci/host/vmd.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/pci/host/vmd.c b/drivers/pci/host/vmd.c
index 6088c3083194..88bf0c754fb2 100644
--- a/drivers/pci/host/vmd.c
+++ b/drivers/pci/host/vmd.c
@@ -755,6 +755,11 @@ 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;
@@ -763,7 +768,16 @@ 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;
 }
-- 
2.11.0