tree a1b816824abd94a761579e7615a78f81789b08a9
parent e1be0001664d1dde6be16a156e2e160ea9898157
author Mathias Nyman <mathias.nyman@linux.intel.com> 1649425703 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1652079897 +0200

xhci: increase usb U3 -> U0 link resume timeout from 100ms to 500ms

commit 33597f0c48be0836854d43c577e35c8f8a765a7d upstream.

The first U3 wake signal by the host may be lost if the USB 3 connection is
tunneled over USB4, with a runtime suspended USB4 host, and firmware
implemented connection manager.

Specs state the host must wait 100ms (tU3WakeupRetryDelay) before
resending a U3 wake signal if device doesn't respond, leading to U3 -> U0
link transition times around 270ms in the tunneled case.

Fixes: 0200b9f790b0 ("xhci: Wait until link state trainsits to U0 after setting USB_SS_PORT_LS_U0")
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220408134823.2527272-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>