diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2022-04-08 16:48:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-09 10:03:21 +0300 |
| commit | 1e8716a5c0873c9f824e052ccc407db04560ad79 (patch) | |
| tree | b9f5942bc7b892a553ca7ca5101f9bd029dd60c0 | |
| parent | b8d3a4681f28556451d1cf0de1f48b0af5cfbb8b (diff) | |
| download | linux-1e8716a5c0873c9f824e052ccc407db04560ad79.tar.xz | |
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>
| -rw-r--r-- | drivers/usb/host/xhci-hub.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index db65e1ad00de..dd46c15c4853 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -1343,7 +1343,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, } spin_unlock_irqrestore(&xhci->lock, flags); if (!wait_for_completion_timeout(&bus_state->u3exit_done[wIndex], - msecs_to_jiffies(100))) + msecs_to_jiffies(500))) xhci_dbg(xhci, "missing U0 port change event for port %d\n", wIndex); spin_lock_irqsave(&xhci->lock, flags); |