On 2021/3/25 18:10, LeoLiu-oc wrote:

On Zhaoxin ZX-100 project, xHCI can't work normally after resume from system Sx state. To fix this issue, when resume from system sx state, reinitialize xHCI instead of restore.

The patch is scheduled to be submitted to the kernel mainline in 2021.

Signed-off-by: LeoLiu-oc <LeoLiu-oc@zhaoxin.com> ---  drivers/usb/host/xhci-pci.c | 3 +++  1 file changed, 3 insertions(+)

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index e1b2dec099f2..1812d28b117d 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -259,6 +259,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)      if (pdev->vendor == PCI_VENDOR_ID_TI && pdev->device == 0x8241)          xhci->quirks |= XHCI_LIMIT_ENDPOINT_INTERVAL_7;

+    if (pdev->vendor == PCI_VENDOR_ID_ZHAOXIN && pdev->device == 0x9202) +        xhci->quirks |= XHCI_RESET_ON_RESUME; +      if ((pdev->vendor == PCI_VENDOR_ID_BROADCOM ||           pdev->vendor == PCI_VENDOR_ID_CAVIUM) &&           pdev->device == 0x9026)

Reviewed-by: Hanjun Guo <guohanjun@huawei.com>