On 10/21/2015 06:14 PM, Andrew Lunn wrote: > On Wed, Oct 21, 2015 at 05:37:45PM +0200, Neil Armstrong wrote: >> Like the change made for mv88e6xxx, use mutex_lock_nested() to avoid >> lockdep to give false positives because of nested MDIO busses. > > Hi Neil > > We now have three instances of this, since mdio-mux.c has the same > code. Maybe now would be a good time to refactor this code into > mdiobus_read_nested() and mdiobus_write_nested() in mdio_bus.c? At > the same time, add BUG_ON(in_interrupt()) similar to the non-nested > versions? > > Andrew > Well, mdio-mux also calls switch_fn inside the mdio_lock, clean refactoring would introduce a separate lock and call the nested variants. Is that ok ? Can someone test mdio-mux is I make the change ?
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