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| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2022-06-23 13:19:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-23 16:27:28 +0200 |
| commit | 83810f84ecf11dfc5a9414a8b762c3501b328185 (patch) | |
| tree | adaa904d56d048043ad94afae077958931479586 /drivers/usb/host/xhci-hub.c | |
| parent | xhci: Keep interrupt disabled in initialization until host is running. (diff) | |
| download | linux-83810f84ecf11dfc5a9414a8b762c3501b328185.tar.xz linux-83810f84ecf11dfc5a9414a8b762c3501b328185.zip | |
xhci: turn off port power in shutdown
If ports are not turned off in shutdown then runtime suspended
self-powered USB devices may survive in U3 link state over S5.
During subsequent boot, if firmware sends an IPC command to program
the port in DISCONNECT state, it will time out, causing significant
delay in the boot time.
Turning off roothub port power is also recommended in xhci
specification 4.19.4 "Port Power" in the additional note.
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220623111945.1557702-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-hub.c')
| -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 c54f2bc23d3f..0fdc014c9401 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -652,7 +652,7 @@ struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd) * It will release and re-aquire the lock while calling ACPI * method. */ -static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, +void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, u16 index, bool on, unsigned long *flags) __must_hold(&xhci->lock) { |