xhci: Don't print a warning when setting link state for disabled ports
authorMathias Nyman <mathias.nyman@linux.intel.com>
Mon, 12 Feb 2018 12:24:47 +0000 (14:24 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 18 Oct 2018 07:13:21 +0000 (09:13 +0200)
commitd5b33599b3feb88037271be5b0aaaa775bcf2778
tree5bf52e32a5a0c3d73e25f27844c25651a0b1ef9d
parentc97b64bd3571a184893a228738c413512f7d7d64
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>
drivers/usb/host/xhci-hub.c