Re: [PATCH 2/2] i2c: mux: annotate the nested rt_mutex usage

2018-05-26 Thread kbuild test robot
Hi Peter, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v4.17-rc6] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Peter-Rosin/rt

[PATCH 2/2] i2c: mux: annotate the nested rt_mutex usage

2018-05-24 Thread Peter Rosin
If an i2c topology has instances of nested muxes, then a lockdep splat is produced when when i2c_parent_lock_bus() is called. Here is an example: WARNING: possible recursive locking detected insmod/68159 is