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Message-Id: <20230802090642.1642-1-zhuyinbo@loongson.cn>
Date: Wed, 2 Aug 2023 17:06:42 +0800
From: Yinbo Zhu <zhuyinbo@...ngson.cn>
To: Mathias Nyman <mathias.nyman@...el.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Jianmin Lv <lvjianmin@...ngson.cn>, wanghongliang@...ngson.cn,
Liu Peibao <liupeibao@...ngson.cn>,
loongson-kernel@...ts.loongnix.cn, Yinbo Zhu <zhuyinbo@...ngson.cn>
Subject: [PATCH] usb: xhci-plat: fix usb disconnect issue after s4
The xhci retaining bogus hardware states cause usb disconnect devices
connected before hibernation(s4) and refer to the commit '547d55fa83
("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@...ngson.cn>
---
drivers/usb/host/xhci-plat.c | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 28218c8f1837..41a213070435 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);
@@ -499,7 +509,12 @@ 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)
+ .suspend = xhci_plat_suspend,
+ .resume = xhci_plat_resume,
+ .freeze = xhci_plat_suspend,
+ .thaw = xhci_plat_resume,
+ .poweroff = xhci_plat_suspend,
+ .restore = xhci_plat_restore,
SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
xhci_plat_runtime_resume,
--
2.31.1
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