summaryrefslogtreecommitdiffstats
path: root/drivers/xen
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/xen-pciback/pci_stub.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c
index 843a2baffc2b..8580e53355ec 100644
--- a/drivers/xen/xen-pciback/pci_stub.c
+++ b/drivers/xen/xen-pciback/pci_stub.c
@@ -105,7 +105,7 @@ static void pcistub_device_release(struct kref *kref)
*/
__pci_reset_function_locked(dev);
if (pci_load_and_free_saved_state(dev, &dev_data->pci_saved_state))
- dev_dbg(&dev->dev, "Could not reload PCI state\n");
+ dev_info(&dev->dev, "Could not reload PCI state\n");
else
pci_restore_state(dev);
@@ -257,6 +257,8 @@ void pcistub_put_pci_dev(struct pci_dev *dev)
{
struct pcistub_device *psdev, *found_psdev = NULL;
unsigned long flags;
+ struct xen_pcibk_dev_data *dev_data;
+ int ret;
spin_lock_irqsave(&pcistub_devices_lock, flags);
@@ -280,8 +282,18 @@ void pcistub_put_pci_dev(struct pci_dev *dev)
*/
device_lock_assert(&dev->dev);
__pci_reset_function_locked(dev);
- pci_restore_state(dev);
+ dev_data = pci_get_drvdata(dev);
+ ret = pci_load_saved_state(dev, dev_data->pci_saved_state);
+ if (!ret) {
+ /*
+ * The usual sequence is pci_save_state & pci_restore_state
+ * but the guest might have messed the configuration space up.
+ * Use the initial version (when device was bound to us).
+ */
+ pci_restore_state(dev);
+ } else
+ dev_info(&dev->dev, "Could not reload PCI state\n");
/* This disables the device. */
xen_pcibk_reset_device(dev);