On 06/13/2010 05:31 PM, Tejun Heo wrote: > Thanks to its age, ATA is very susceptible to IRQ delivery problems in > both directions - lost and spurious interrupts. In traditional PATA, > the IRQ line is ultimately out of the controller and driver's control. > Even relatively new SATA isn't free from these issues. Many > controllers still emulate the traditional IDE interface which doesn't > have reliable way to indicate interrupt pending state and there also > is an issue regarding the interpretation of nIEN on both sides of the > cable. > > Most of these problems can be worked around by using the new IRQ > expecting mechanism without adding noticeable overhead. In ATA, > almost all operations are initiated by the host and the controller > signals progress or completion using IRQ. IRQ expecting can easily be > added in libata core and applied to all libata drivers. > > Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> Jeff, can you please ack this change if this looks okay to you? Also, would it okay to route this through irq tree? Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
