On Thu, Aug 18, 2016 at 11:48:52PM -0400, Sinan Kaya wrote: > On 8/18/2016 11:42 PM, Vinod Koul wrote: > > On Thu, Aug 18, 2016 at 11:26:28PM -0400, Sinan Kaya wrote: > >> On 8/18/2016 10:48 PM, Vinod Koul wrote: > >>>> Keep a size limited list with error cookies and flush them in terminate all? > >>> I think so, terminate_all anyway cleans up the channel. Btw what is the > >>> behaviour on error? Do you terminate or somthing else? > >>> > >> > >> On error, I flush all outstanding transactions with an error code and I reset > >> the channel. After the reset, the DMA channel is functional again. The client > >> doesn't need to shutdown anything. > > > > You mean from the client context or driver? > > > > The client doesn't need to call device_free_chan_resources and device_terminate_all > to be specific. Client can certainly call these if it needs to but it is not > required to recover the channel. You didn't answer my question! On error you said you flush, so who does that? > After the reset in error condition, the client can continue issuing new requests > with tx_submit and device_issue_pending as usual. -- ~Vinod -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
