Driver core: wakeup the parent device before trying probe
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>
Mon, 27 Jul 2015 15:03:58 +0000 (18:03 +0300)
committerLee Jones <lee.jones@linaro.org>
Tue, 28 Jul 2015 07:50:42 +0000 (08:50 +0100)
commitddef08dd00f5548f943422c86e4ffe67dd040b6c
tree359d5f96695c2ecd7442df32ba4083dc4db24e5b
parent712e960f0ee9337f3473ba3de2bcfc7e87b7c5a4
Driver core: wakeup the parent device before trying probe

If the parent is still suspended when driver probe is
attempted, the result may be failure.

For example, if the parent is a PCI MFD device that has been
suspended when we try to probe our device, any register
reads will return 0xffffffff.

To fix the problem, making sure the parent is always awake
before attempting driver probe.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
drivers/base/dd.c