search for: f6a4dd10d9b0

...e may have + * been in D3cold as well and require restoration of its BARs. */ - if (!pci_dev->driver) + if (!pci_dev->driver) { + pci_restore_bars(pci_dev); return 0; + } if (!pm || !pm->runtime_resume) return -ENOSYS; diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index f6a4dd10d9b0..f694650235f2 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -563,7 +563,7 @@ int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask) * Restore the BAR values for a given device, so as to make it * accessible by its driver. */ -static void pci_restore_bars(struct pci_dev *...

...store_bars() path looks a little smarter in that it is more careful when updating 64-bit BARs that can't be updated atomically. > return 0; > + } > > if (!pm || !pm->runtime_resume) > return -ENOSYS; > diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c > index f6a4dd10d9b0..f694650235f2 100644 > --- a/drivers/pci/pci.c > +++ b/drivers/pci/pci.c > @@ -563,7 +563,7 @@ int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask) > * Restore the BAR values for a given device, so as to make it > * accessible by its driver. > */ > -static voi...

Modernize vga_switcheroo by using a "device link" to enforce a runtime PM dependency from an HDA controller to the GPU it's integrated into. Remove thereby obsoleted code and fix a bunch of bugs. Device links were introduced in v4.10. Users might see a small power saving if the discrete GPU is in use and its HDA controller is not, because the HDA controller is now allowed to runtime

Modernize vga_switcheroo by using a device link to enforce a runtime PM dependency from an HDA controller to the GPU it's integrated into, v2. Changes since v1: - Replace patch [1/7] to use pci_save_state() / pci_restore_state() for consistency between runtime PM code path of bound and unbound devices. (Rafael, Bjorn) - Patch [5/7]: Drop an unnecessary initialization. (Bjorn) Rephrase