The xhci retaining bogus hardware states cause usb disconnect devices
connected before hibernation(s4) and refer to the commit 'f3d478858be
("usb: ohci-platform: fix usb disconnect issue after s4")' which set
flag "hibernated" as true when resume-from-hibernation and that the
drivers will reset the hardware to get rid of any existing state and
make sure resume from hibernation re-enumerates everything for xhci.
Signed-off-by: Yinbo Zhu <zhuyinbo@xxxxxxxxxxx>
---
Change in v2:
1. Add CONFIG_PM_SLEEP in xhci_plat_pm_ops that for fix
compile issue when CONFIG_PM not enable.
drivers/usb/host/xhci-plat.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 28218c8f1837..112468fdcca2 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -451,7 +451,7 @@ static int __maybe_unused xhci_plat_suspend(struct device *dev)
return 0;
}
-static int __maybe_unused xhci_plat_resume(struct device *dev)
+static int __maybe_unused xhci_plat_resume_common(struct device *dev, struct pm_message pmsg)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
@@ -466,7 +466,7 @@ static int __maybe_unused xhci_plat_resume(struct device *dev)
if (ret)
return ret;
- ret = xhci_resume(xhci, PMSG_RESUME);
+ ret = xhci_resume(xhci, pmsg);
if (ret)
return ret;
@@ -477,6 +477,16 @@ static int __maybe_unused xhci_plat_resume(struct device *dev)
return 0;
}
+static int __maybe_unused xhci_plat_resume(struct device *dev)
+{
+ return xhci_plat_resume_common(dev, PMSG_RESUME);
+}
+
+static int __maybe_unused xhci_plat_restore(struct device *dev)
+{
+ return xhci_plat_resume_common(dev, PMSG_RESTORE);
+}
+
static int __maybe_unused xhci_plat_runtime_suspend(struct device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
@@ -499,8 +509,14 @@ static int __maybe_unused xhci_plat_runtime_resume(struct device *dev)
}
const struct dev_pm_ops xhci_plat_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(xhci_plat_suspend, xhci_plat_resume)
-
+#ifdef CONFIG_PM_SLEEP
+ .suspend = xhci_plat_suspend,
+ .resume = xhci_plat_resume,
+ .freeze = xhci_plat_suspend,
+ .thaw = xhci_plat_resume,
+ .poweroff = xhci_plat_suspend,
+ .restore = xhci_plat_restore,
+#endif
SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
xhci_plat_runtime_resume,
NULL)
--
2.20.1
