mirror of https://gitee.com/openkylin/linux.git
usb: allow lpm (en/dis)able only if device is atleast in default state
When a USB device is disconnected, usb_unbind_interface is called, which tries to enable and disable LPM. usb_enable_lpm also try to send a control command SET SEL to the device. Since device is already disconnected, therefore it does not make sense to execute usb_(en/dis)able_lpm. This patch returns from usb_(en/dis)able_lpm, if device was not in default state atleast. Signed-off-by: Pratyush Anand <pratyush.anand@st.com> Tested-by: Aymen Bouattay <aymen.bouattay@st.com> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
b2f463e130
commit
51df62ff74
drivers/usb/core
|
@ -3860,7 +3860,8 @@ int usb_disable_lpm(struct usb_device *udev)
|
|||
|
||||
if (!udev || !udev->parent ||
|
||||
udev->speed != USB_SPEED_SUPER ||
|
||||
!udev->lpm_capable)
|
||||
!udev->lpm_capable ||
|
||||
udev->state < USB_STATE_DEFAULT)
|
||||
return 0;
|
||||
|
||||
hcd = bus_to_hcd(udev->bus);
|
||||
|
@ -3916,7 +3917,8 @@ void usb_enable_lpm(struct usb_device *udev)
|
|||
|
||||
if (!udev || !udev->parent ||
|
||||
udev->speed != USB_SPEED_SUPER ||
|
||||
!udev->lpm_capable)
|
||||
!udev->lpm_capable ||
|
||||
udev->state < USB_STATE_DEFAULT)
|
||||
return;
|
||||
|
||||
udev->lpm_disable_count--;
|
||||
|
|
Loading…
Reference in New Issue