usb: host: xhci-plat: Fix timeout on removal of hot pluggable xhci controllers
authorGuenter Roeck <linux@roeck-us.net>
Thu, 9 Mar 2017 13:39:37 +0000 (15:39 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 9 Mar 2017 17:00:39 +0000 (18:00 +0100)
commitdcc7620cad5ad1326a78f4031a7bf4f0e5b42984
tree2df3549d223e96a823c40dea085f1beea9902d3e
parentf95e60a7dbecd2de816bb3ad517b3d4fbc20b507
usb: host: xhci-plat: Fix timeout on removal of hot pluggable xhci controllers

Upstream commit 98d74f9ceaef ("xhci: fix 10 second timeout on removal of
PCI hotpluggable xhci controllers") fixes a problem with hot pluggable PCI
xhci controllers which can result in excessive timeouts, to the point where
the system reports a deadlock.

The same problem is seen with hot pluggable xhci controllers using the
xhci-plat driver, such as the driver used for Type-C ports on rk3399.
Similar to hot-pluggable PCI controllers, the driver for this chip
removes the xhci controller from the system when the Type-C cable is
disconnected.

The solution for PCI devices works just as well for non-PCI devices
and avoids the problem.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/xhci-plat.c