So I've been adding runtime pm to nouveau/radeon, and on X start it does a lot of pci accesses. Now because the pm on these devices is equivalent to D3cold, we have to resume them which involves a heavy latency due to POSTing the cards. The driver configures the autosuspend timeout to 5s for this reason, and I think the PCI layer config accesses should respect the autosuspend. Cc: Huang Ying <ying.huang@xxxxxxxxx> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Cc: Rafael J. Wysocki <rjw@xxxxxxx> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx> --- drivers/pci/pci-sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 02d107b..12d3d52 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -487,7 +487,7 @@ pci_config_pm_runtime_put(struct pci_dev *pdev) struct device *dev = &pdev->dev; struct device *parent = dev->parent; - pm_runtime_put(dev); + pm_runtime_put_autosuspend(dev); if (parent) pm_runtime_put_sync(parent); } -- 1.7.12.1 -- 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
