On Mon, Nov 16, 2015 at 09:38:40PM +0100, Lukas Wunner wrote:
From: Matthew Garrett matthew.garrett@nebula.com
Registering the handler after both GPUs will trigger a DDC switch for connector reprobing. This will oops if apple_gmux_data hasn't already been assigned. Reorder the code to do that.
[Lukas: More generally, this commit fixes a race condition that is triggered by invoking a handler callback between the call to vga_switcheroo_register_handler() and the assignment of apple_gmux_data.]
Tested-by: Pierre Moreau pierre.morrow@free.fr [MBP 5,3 2009 nvidia MCP79 + G96 pre-retina 15"] Tested-by: Paul Hordiienko pvt.gord@gmail.com [MBP 6,2 2010 intel ILK + nvidia GT216 pre-retina 15"] Tested-by: Lukas Wunner lukas@wunner.de [MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina 15"] Tested-by: William Brown william@blackhats.net.au [MBP 8,2 2011 intel SNB + amd turks pre-retina 15"] Tested-by: Bruno Bierbaumer bruno@bierbaumer.net [MBP 11,3 2013 intel HSW + nvidia GK107 retina 15"]
Signed-off-by: Matthew Garrett matthew.garrett@nebula.com Reviewed-by: Lukas Wunner lukas@wunner.de Signed-off-by: Lukas Wunner lukas@wunner.de
My apologies for the delay. Thank you for the testing data and submitting.
I have queued this to testing. Pending success on 0-day, it will land in linux-next shortly (tomorrow most likely) where I hope it will receive additional testing.