diff options
| -rw-r--r-- | drivers/usb/host/xhci-mem.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 7eb8c07c8418..34d95c006751 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -2129,6 +2129,15 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, if (major_revision == 0x03) { rhub = &xhci->usb3_rhub; + /* + * Some hosts incorrectly use sub-minor version for minor + * version (i.e. 0x02 instead of 0x20 for bcdUSB 0x320 and 0x01 + * for bcdUSB 0x310). Since there is no USB release with sub + * minor version 0x301 to 0x309, we can assume that they are + * incorrect and fix it here. + */ + if (minor_revision > 0x00 && minor_revision < 0x10) + minor_revision <<= 4; } else if (major_revision <= 0x02) { rhub = &xhci->usb2_rhub; } else { |