On 8/19/2016 1:02 PM, Vinod Koul wrote: > On Fri, Aug 19, 2016 at 07:13:43AM -0400, okaya@xxxxxxxxxxxxxx wrote: >> On 2016-08-19 01:52, Vinod Koul wrote: >>> 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? >> >> This is done by the driver in interrupt context when an error >> interrupt is received. All transactions are posted and hw is reset. > > Hmmm, waht about the txn which are pending? DO you clear them..? > Yes, I clear both pending and active transactions. -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project. -- 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
