> > intel_setup_gmbus registers the i2c adapters, which does transfers on > > the i2c bus on probe, and this happens before intel_power_domains_init > > which initializes the power domain lock. > > > > The bisect and backtrace make sense and are not mysterious at all. > > > > Not sure of the fix though, are we better off changing the init order, > > or making sure the probes don't happen or don't screw us up. > > So I started wondering why we are not seeing this. To reproduce, looks > like you'll need to have an i2c driver with class I2C_CLASS_DDC for the > i2c detect (and the bug) to happen. In tree, the only ones seem to be > > drivers/misc/eeprom/eeprom.c Yes, I have that for DIMM SPD information access. > drivers/staging/olpc_dcon/olpc_dcon.c > > I presume you have one or the other. > > No matter what, userspace can access the adapter right away when we > register it, so this needs to be fixed along the lines of [1]. > > BR, > Jani. > > > [1] http://patchwork.freedesktop.org/patch/msgid/1452157856-27360-1-git-send-email-daniel.vetter@xxxxxxxx -- Meelis Roos (mroos@xxxxxxxx) _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
