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418e4da33f
If one of device drivers refuses to suspend by returning error code from its ->suspend() callback, the devices that have already been suspended are resumed by executing their drivers' ->resume() callbacks. Some of these callbacks expect the device's configuration space to be restored if the device has been put into D3 before they are called. Unfortunately, this mechanism has been broken by recent changes moving the restoration of config spaces of some devices (most importantly, USB controllers and HDA Intel) into the resume callbacks executed with interrupts off. Obviously, these callbacks are not invoked in the suspend error path and, as a result, the system cannot be successfully brought back into the working state in case of a suspend error. The same thing happens in the hibernation error path right before putting the system into S4. Similarly, the suspend testing facility associated with the /sys/power/pm_test file is broken, because it uses the very same mechanism that is used in the suspend and hibernation error paths. Fix the breakage by making the PCI core restore the configuration spaces of PCI devices that haven't been restored already before pci_pm_resume() is called for those devices by the PM core. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> |
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| .. | ||
| hotplug | ||
| pcie | ||
| .gitignore | ||
| access.c | ||
| bus.c | ||
| dmar.c | ||
| hotplug-pci.c | ||
| hotplug.c | ||
| htirq.c | ||
| intel-iommu.c | ||
| intr_remapping.c | ||
| intr_remapping.h | ||
| iova.c | ||
| irq.c | ||
| Kconfig | ||
| Makefile | ||
| msi.c | ||
| msi.h | ||
| pci-acpi.c | ||
| pci-driver.c | ||
| pci-stub.c | ||
| pci-sysfs.c | ||
| pci.c | ||
| pci.h | ||
| probe.c | ||
| proc.c | ||
| quirks.c | ||
| remove.c | ||
| rom.c | ||
| search.c | ||
| setup-bus.c | ||
| setup-irq.c | ||
| setup-res.c | ||
| slot.c | ||
| syscall.c | ||