usb: xhci: increase CRS timeout value

Some controllers take almost 55ms to complete controller
restore state (CRS).
There is no timeout limit mentioned in xhci specification so
fixing the issue by increasing the timeout limit to 100ms

[reformat code comment -Mathias]
Signed-off-by: Ajay Gupta <ajaykuee@gmail.com>
Signed-off-by: Nagaraj Annaiah <naga.annaiah@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index f11ec61bcc7d969df31c866e2da56c72f8c88aa8..2f4850f25e82f0f009b8f614b593fc74eb5247aa 100644 (file)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1078,8 +1078,13 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
                command = readl(&xhci->op_regs->command);
                command |= CMD_CRS;
                writel(command, &xhci->op_regs->command);
+               /*
+                * Some controllers take up to 55+ ms to complete the controller
+                * restore so setting the timeout to 100ms. Xhci specification
+                * doesn't mention any timeout value.
+                */
                if (xhci_handshake(&xhci->op_regs->status,
-                             STS_RESTORE, 0, 10 * 1000)) {
+                             STS_RESTORE, 0, 100 * 1000)) {
                        xhci_warn(xhci, "WARN: xHC restore state timeout\n");
                        spin_unlock_irq(&xhci->lock);
                        return -ETIMEDOUT;