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authorMathias Nyman <mathias.nyman@linux.intel.com>2018-02-12 14:24:47 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-10-18 09:13:21 +0200
commitd5b33599b3feb88037271be5b0aaaa775bcf2778 (patch)
tree5bf52e32a5a0c3d73e25f27844c25651a0b1ef9d
parentc97b64bd3571a184893a228738c413512f7d7d64 (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>
-rw-r--r--drivers/usb/host/xhci-hub.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 0722f75f1d6a..45a03eff4db1 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -1072,17 +1072,17 @@ 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);