On Fri, Jul 28, 2017 at 01:08:25PM +0200, Egil Hjelmeland wrote:
> On 26. juli 2017 18:55, Andrew Lunn wrote:
> >On Tue, Jul 25, 2017 at 06:15:44PM +0200, Egil Hjelmeland wrote:
> >It is better to use mdiobus_read/write or if you are nesting mdio
> >busses, mdiobus_read_nested/mdiobus_write_nested. Please test this
> >code with lockdep enabled.
> >
>
> I have CONFIG_DEBUG_SPINLOCK, CONFIG_DEBUG_MUTEXES. Should I enable
> more?
Hi Egil
Enable CONFIG_LOCKDEP and CONFIG_PROVE_LOCKING.
Any lockdep splat you get while accessing the mdio bus at this point
are probably false positives, since it is a different mutex. Using the
_nested() version should avoid these false positives. But you might
find other places your locking is not right.
Andrew
--
To unsubscribe from this list: send the line "unsubscribe linux-doc" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
