On Mon, 27 Apr 2009, Aaro Koskinen wrote: > Paul Walmsley wrote: > > It seems to work: under constant I2C load, no spurious IRQ messages > > showed up after several hours of testing. (Without these patches, > > spurious IRQs usually show up in a few minutes.) Some of the code has > > also been cleaned up. > > > > Any feedback on how this series works for others is appreciated. > > > > Tested on N800, Beagle and 3430SDP. > > With these patches I'm getting receive overruns quite easily on rx51 when > doing large reads from TWL4030 RTC. A brief update for anyone following along on the list: Aaro sent me a test-case. It seems that the receive overruns only affect PM kernels. They are caused by the MPU going to sleep while it waits for an I2C interrupt. It turns out that the current driver causes receive overruns also; it just hides them. The receive overruns are fairly straightforward to deal with by setting an MPU wakeup latency constraint during I2C operations. So the plan now is to send two sets of patches. One set will resolve the spurious IRQ problems. The other will resolve the receive overrun issues and will be mostly against the PM branch. - Paul -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
