On Wed, 2015-01-14 at 11:57 +0000, Bogdan Purcareata wrote: > The readback is necessary in order to handle PCI posted > writes,
That is unclear. > or when the MPIC is handling interrupts in a loop > (ppc_md.get_irq). I'm questioning this one as well -- if reading WHOAMI is sufficient to sync with the EOI, why wouldn't reading INTACK work as well? > Newer MPIC versions don't require this readback. Leave the option > configurable using a device tree entry. > > This saves a MMIO trap per interrupt. > > Signed-off-by: Scott Wood <[email protected]> > Signed-off-by: Bogdan Purcareata <[email protected]> You should note changes (e.g. with a [] note between signoffs) if it differs from the original... -Scott -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
