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usbcore: Bug fix: system can't suspend with USB3.0 device connected to USB3.0 hub
This patch clear PORT_POWER when suspend a USB3.0 device behind a USB3.0 external hub, so the system can suspend and resume. Note USB3.0 device may not work after system resume and this is a temporary workaround. The correct fix will be in future patches. Signed-off-by: Andiry Xu <andiry.xu@amd.com> Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
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@ -2285,7 +2285,17 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
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}
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/* see 7.1.7.6 */
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status = set_port_feature(hub->hdev, port1, USB_PORT_FEAT_SUSPEND);
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/* Clear PORT_POWER if it's a USB3.0 device connected to USB 3.0
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* external hub.
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* FIXME: this is a temporary workaround to make the system able
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* to suspend/resume.
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*/
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if ((hub->hdev->parent != NULL) && hub_is_superspeed(hub->hdev))
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status = clear_port_feature(hub->hdev, port1,
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USB_PORT_FEAT_POWER);
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else
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status = set_port_feature(hub->hdev, port1,
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USB_PORT_FEAT_SUSPEND);
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if (status) {
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dev_dbg(hub->intfdev, "can't suspend port %d, status %d\n",
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port1, status);
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