On Wed, May 25, 2016 at 5:04 PM, Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> wrote: > The PCI PM 1.2 specification requires minimum of 50ms before function on a > bus is accessed after the bus is transitioned from B2 to B0. Now that we > actually power down bridges we should make sure the specification is > followed accordingly. > > Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> ACK > --- > Hi Bjorn, > > Since this is only needed when bridges are powered down, I think it makes > sense to put this to your pci/pm branch. > > drivers/pci/pci.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c > index e785dc260e72..e645a3d4f2e0 100644 > --- a/drivers/pci/pci.c > +++ b/drivers/pci/pci.c > @@ -2361,7 +2361,12 @@ void pci_pm_init(struct pci_dev *dev) > } > > dev->pm_cap = pm; > - dev->d3_delay = PCI_PM_D3_WAIT; > + /* > + * PCI PM 1.2 specification requires minimum of 50ms before any > + * function on the bus is accessed after the bus is transitioned > + * from B2 to B0. > + */ > + dev->d3_delay = pci_is_bridge(dev) ? PCI_PM_BUS_WAIT : PCI_PM_D3_WAIT; > dev->d3cold_delay = PCI_PM_D3COLD_WAIT; > dev->bridge_d3 = pci_bridge_d3_possible(dev); > dev->d3cold_allowed = true; > -- > 2.8.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
