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Subject[PATCH 4.9 135/137] PCI: vmd: Free up IRQs on suspend path
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Scott Bauer <scott.bauer@intel.com>

commit e2b1820bd5d0962d6f271b0d47c3a0e38647df2f upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Sushma Kalakota <sushmax.kalakota@intel.com>

---
drivers/pci/host/vmd.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

--- a/drivers/pci/host/vmd.c
+++ b/drivers/pci/host/vmd.c
@@ -731,6 +731,11 @@ static void vmd_remove(struct pci_dev *d
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;
@@ -739,6 +744,16 @@ static int vmd_suspend(struct device *de
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;

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