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 --- drivers/usb/core/hub.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -3496,9 +3496,6 @@ int usb_port_resume(struct usb_device *u * sequence. */ status = hub_port_status(hub, port1, &portstatus, &portchange); - - /* TRSMRCY = 10 msec */ - msleep(10); }
SuspendCleared: @@ -3513,6 +3510,9 @@ int usb_port_resume(struct usb_device *u usb_clear_port_feature(hub->hdev, port1, USB_PORT_FEAT_C_SUSPEND); } + + /* TRSMRCY = 10 msec */ + msleep(10); }
if (udev->persist_enabled)