Re: Stack dump when try to store uframe_periodic_max

2015-08-17 Thread Peter Chen
On Mon, Aug 17, 2015 at 12:04:07PM -0400, Alan Stern wrote: > On Mon, 17 Aug 2015, Peter Zijlstra wrote: > > > On Mon, Aug 17, 2015 at 10:32:20AM -0400, Alan Stern wrote: > > > On Mon, 17 Aug 2015, Peter Chen wrote: > > > > > > > Hi Alan, > > > > > > > > When run "echo 105 > > > > > /sys/bus/p

Re: Stack dump when try to store uframe_periodic_max

2015-08-17 Thread Alan Stern
On Mon, 17 Aug 2015, Peter Zijlstra wrote: > On Mon, Aug 17, 2015 at 10:32:20AM -0400, Alan Stern wrote: > > On Mon, 17 Aug 2015, Peter Chen wrote: > > > > > Hi Alan, > > > > > > When run "echo 105 > > > > /sys/bus/platform/devices/ci_hdrc.1/uframe_periodic_max", > > > if lockdep check is enab

Re: Stack dump when try to store uframe_periodic_max

2015-08-17 Thread Peter Zijlstra
On Mon, Aug 17, 2015 at 10:32:20AM -0400, Alan Stern wrote: > On Mon, 17 Aug 2015, Peter Chen wrote: > > > Hi Alan, > > > > When run "echo 105 > > > /sys/bus/platform/devices/ci_hdrc.1/uframe_periodic_max", > > if lockdep check is enabled, there is below dump, I am afraid it can't > > find how

Re: Stack dump when try to store uframe_periodic_max

2015-08-17 Thread Alan Stern
On Mon, 17 Aug 2015, Peter Chen wrote: > Hi Alan, > > When run "echo 105 > > /sys/bus/platform/devices/ci_hdrc.1/uframe_periodic_max", > if lockdep check is enabled, there is below dump, I am afraid it can't > find how to fix it, the warning shows the key is not persistent. > (see line 757, ker

Stack dump when try to store uframe_periodic_max

2015-08-16 Thread Peter Chen
Hi Alan, When run "echo 105 > /sys/bus/platform/devices/ci_hdrc.1/uframe_periodic_max", if lockdep check is enabled, there is below dump, I am afraid it can't find how to fix it, the warning shows the key is not persistent. (see line 757, kernel/locking/lockdep.c). [ 70.190430] INFO: trying t