From: Chunfeng Yun chunfeng.yun@mediatek.com
commit 975f94c7d6c306b833628baa9aec3f79db1eb3a1 upstream.
This may happen if the port becomes resume status exactly when usb_port_resume() gets port status, it still need provide a TRSMCRY time before access the device.
CC: stable@vger.kernel.org Reported-by: Tianping Fang tianping.fang@mediatek.com Acked-by: Alan Stern stern@rowland.harvard.edu Signed-off-by: Chunfeng Yun chunfeng.yun@mediatek.com Link: https://lore.kernel.org/r/20210512020738.52961-1-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/usb/core/hub.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index fa28f23a4a336..0ddc2e30065f5 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3539,9 +3539,6 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) * sequence. */ status = hub_port_status(hub, port1, &portstatus, &portchange); - - /* TRSMRCY = 10 msec */ - msleep(10); }
SuspendCleared: @@ -3556,6 +3553,9 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg) usb_clear_port_feature(hub->hdev, port1, USB_PORT_FEAT_C_SUSPEND); } + + /* TRSMRCY = 10 msec */ + msleep(10); }
if (udev->persist_enabled)