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.hu...@intel.com>
Cc: Bjorn Helgaas <bhelg...@google.com>
Cc: Rafael J. Wysocki <r...@sisk.pl>
Signed-off-by: Dave Airlie <airl...@redhat.com>
---
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
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