Re: [RFC 3/3] serial: 8250_omap: try to avoid IER_RDI with DMA

2015-08-26 Thread Sekhar Nori
On Friday 14 August 2015 09:31 PM, Sebastian Andrzej Siewior wrote: It has been observed on DRA7-evm that the UART triggers the interrupt and reading IIR says IIR_NO_INT. It seems that we receive data via RX-DMA but the interrupt is triggered anyway. I have hardly observed it on AM335x and not

[RFC 3/3] serial: 8250_omap: try to avoid IER_RDI with DMA

2015-08-14 Thread Sebastian Andrzej Siewior
It has been observed on DRA7-evm that the UART triggers the interrupt and reading IIR says IIR_NO_INT. It seems that we receive data via RX-DMA but the interrupt is triggered anyway. I have hardly observed it on AM335x and not in *that* quantity. On DRA7-evm with continuous transfers at 3MBaud and