xHCI: fix port U3 status check condition

commit 5ac04bf190e6f8b17238aef179ebd7f2bdfec919 upstream.

Fix the port U3 status check when Clear PORT_SUSPEND Feature.
The port status should be masked with PORT_PLS_MASK to check if it's in
U3 state.

This should be backported to kernels as old as 2.6.37.

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 0be788c..cddcdcc 100644 (file)
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -664,7 +664,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
                        xhci_dbg(xhci, "PORTSC %04x\n", temp);
                        if (temp & PORT_RESET)
                                goto error;
-                       if (temp & XDEV_U3) {
+                       if ((temp & PORT_PLS_MASK) == XDEV_U3) {
                                if ((temp & PORT_PE) == 0)
                                        goto error;