Re: [PATCH 3/4] tty: serial: 8250: omap: convert to using cyclic transfers

From: Peter Hurley
Date: Fri Jan 22 2016 - 11:31:30 EST

Hi John,

On 01/22/2016 02:27 AM, John Ogness wrote:
> Note that an ugly device-tree lookup hack is implemented in order
> to detect if the sDMA engine is being used. This is necessary
> because the sDMA driver does not implement pause/resume correctly
> and therefore requires slightly different logic for the UART
> driver.

No, this is not acceptable.

Please work with Vinod to refine the dma_get_slave_caps() interface
so that dmaengine drivers that don't provide the _documented_ pause/resume
support can be identified generically.

Peter Hurley