Messages in this thread | | | Date | Mon, 25 May 2015 13:36:43 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [PATCH v2 3/8] core: platform: wakeup the parent before trying any driver operations |
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On Mon, 25 May 2015, Andy Shevchenko wrote:
> From: Heikki Krogerus <heikki.krogerus@linux.intel.com> > > If the parent is still suspended when a driver probe, > remove or shutdown is attempted, the result may be a > 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 using driver probe, remove or shutdown. > > Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > --- > drivers/base/platform.c | 21 ++++++++++++++++++++-
Why make the changes here rather than in dd.c? Is there something special about platform devices?
Alan Stern
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