diff options
| author | Andiry Xu <andiry.xu@amd.com> | 2011-03-31 14:56:50 +0800 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2011-04-13 16:57:34 -0700 |
| commit | a8f08d86dbf1b7bb5869cf1807d2fd40ec9d6d0a (patch) | |
| tree | fbca783c75f55cac4eaa5de288cce1cf60fe27e8 /drivers/usb | |
| parent | b214f191d95ba4b5a35aebd69cd129cf7e3b1884 (diff) | |
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/hub.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 8fb754916c6..93720bdc9ef 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2285,7 +2285,17 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg) } /* see 7.1.7.6 */ - status = set_port_feature(hub->hdev, port1, USB_PORT_FEAT_SUSPEND); + /* Clear PORT_POWER if it's a USB3.0 device connected to USB 3.0 + * external hub. + * FIXME: this is a temporary workaround to make the system able + * to suspend/resume. + */ + if ((hub->hdev->parent != NULL) && hub_is_superspeed(hub->hdev)) + status = clear_port_feature(hub->hdev, port1, + USB_PORT_FEAT_POWER); + else + status = set_port_feature(hub->hdev, port1, + USB_PORT_FEAT_SUSPEND); if (status) { dev_dbg(hub->intfdev, "can't suspend port %d, status %d\n", port1, status); |