On Mon, Dec 23, 2013 at 08:23:17PM +0800, Shawn Guo wrote:

On Mon, Dec 23, 2013 at 07:13:04PM +0800, Dong Aisheng wrote:

quoted

It's strange that this issue did not happen on kernel 3.10.17 with the same
code.

Probably just because you did not turn on CONFIG_PROVE_LOCKING on your
3.10.17 kennel.

I did turn it on for the test.

Regards
Dong Aisheng

Shawn

quoted

And looking at the code, before call spin_lock we already disable the mmc
controller irq, per on my understanding, the deadlock given by lockdep may not
be able to happen(pls fix me if wrong).
May the lockdep not track the specific irq disable?
Copy lockdep guy to comment.
---