diff options
| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2018-02-12 14:24:47 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-20 09:52:35 +0200 |
| commit | f37a3ff6e4c7cb93eb65c6fc6c549fafa2673863 (patch) | |
| tree | d9c1955ed3efebce1d3a53f9e090a8fd5257c5d5 /drivers/usb/host/xhci-hub.c | |
| parent | 863334098b60d163d39fde83d6044c54ca60d53e (diff) | |
xhci: Don't print a warning when setting link state for disabled ports
commit 1208d8a84fdcae6b395c57911cdf907450d30e70 upstream.
When disabling a USB3 port the hub driver will set the port link state to
U3 to prevent "ejected" or "safely removed" devices that are still
physically connected from immediately re-enumerating.
If the device was really unplugged, then error messages were printed
as the hub tries to set the U3 link state for a port that is no longer
enabled.
xhci-hcd ee000000.usb: Cannot set link state.
usb usb8-port1: cannot disable (err = -32)
Don't print error message in xhci-hub if hub tries to set port link state
for a disabled port. Return -ENODEV instead which also silences hub driver.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Ross Zwisler <zwisler@google.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 | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c index 9df00101bfe1..f788f80fe1aa 100644 --- a/drivers/usb/host/xhci-hub.c +++ b/drivers/usb/host/xhci-hub.c @@ -1048,17 +1048,17 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, temp = readl(port_array[wIndex]); break; } - - /* Software should not attempt to set - * port link state above '3' (U3) and the port - * must be enabled. - */ - if ((temp & PORT_PE) == 0 || - (link_state > USB_SS_PORT_LS_U3)) { - xhci_warn(xhci, "Cannot set link state.\n"); + /* Port must be enabled */ + if (!(temp & PORT_PE)) { + retval = -ENODEV; + break; + } + /* Can't set port link state above '3' (U3) */ + if (link_state > USB_SS_PORT_LS_U3) { + xhci_warn(xhci, "Cannot set port %d link state %d\n", + wIndex, link_state); goto error; } - if (link_state == USB_SS_PORT_LS_U3) { slot_id = xhci_find_slot_id_by_port(hcd, xhci, wIndex + 1); |