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| author |   Shuah Khan <skhan@linuxfoundation.org> | 2021-08-19 16:59:37 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-26 13:29:27 +0200 |
| commit | 66cce9e73ec61967ed1f97f30cee79bd9a2bb7ee (patch) | |
| tree | 7c874244c40a75d3ccfe1280d33be7082c9fa882 /drivers/usb | |
| parent | usbip: clean up code in vhci_device_unlink_cleanup (diff) | |
| download | linux-dev-66cce9e73ec61967ed1f97f30cee79bd9a2bb7ee.tar.xz linux-dev-66cce9e73ec61967ed1f97f30cee79bd9a2bb7ee.zip | |
usbip:vhci_hcd USB port can get stuck in the disabled state
When a remote usb device is attached to the local Virtual USB
Host Controller Root Hub port, the bound device driver may send
a port reset command.
vhci_hcd accepts port resets only when the device doesn't have
port address assigned to it. When reset happens device is in
assigned/used state and vhci_hcd rejects it leaving the port in
a stuck state.
This problem was found when a blue-tooth or xbox wireless dongle
was passed through using usbip.
A few drivers reset the port during probe including mt76 driver
specific to this bug report. Fix the problem with a change to
honor reset requests when device is in used state (VDEV_ST_USED).
Reported-and-tested-by: Michael <msbroadf@gmail.com>
Suggested-by: Michael <msbroadf@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/r/20210819225937.41037-1-skhan@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/usbip/vhci_hcd.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/usbip/vhci_hcd.c b/drivers/usb/usbip/vhci_hcd.c index b5b31a1d40b6..233265550fc6 100644 --- a/drivers/usb/usbip/vhci_hcd.c +++ b/drivers/usb/usbip/vhci_hcd.c @@ -455,8 +455,14 @@ static int vhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, vhci_hcd->port_status[rhport] &= ~(1 << USB_PORT_FEAT_RESET); vhci_hcd->re_timeout = 0; + /* + * A few drivers do usb reset during probe when + * the device could be in VDEV_ST_USED state + */ if (vhci_hcd->vdev[rhport].ud.status == - VDEV_ST_NOTASSIGNED) { + VDEV_ST_NOTASSIGNED || + vhci_hcd->vdev[rhport].ud.status == + VDEV_ST_USED) { usbip_dbg_vhci_rh( " enable rhport %d (status %u)\n", rhport, |