[PATCH] dmaengine: qcom_hidma: release the descriptor before the callback
From: Vinod Koul <hidden>
Date: 2016-08-19 02:41:05
Also in:
linux-arm-msm, lkml
<sorry for delay, i was out> On Wed, Aug 10, 2016 at 01:31:21PM -0400, Sinan Kaya wrote:
On 8/10/2016 1:28 PM, Vinod Koul wrote:quoted
quoted
That's why, I preferred not to call the callback when I observe an error which Iquoted
think it makes more sense.That doesnt make sense. A client set a callback, it expect you to call one. The result quried maybe txn completed or error. Since you have means, please report..If there is a good way to fix tx_status, I can certainly do so. I just need to make sure my implementation is robust and reliable. I saw your reply that we need to keep this information around until terminate_all is called. What is a good implementation strategy? 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?
What should I do if code reaches to the size limit? Size the error cookie list double the size of available descriptors?
That won't help as you would have two values per cookie and we dont want that :)
quoted
quoted
Again, it will be a different patch than this one. I think v2 of this patchquoted
needs to go in as it is. https://lkml.org/lkml/2016/7/31/64I havent looked at the patch. If it is not invoking callback set by user, then I am not taking it. Sorry, we dont choose over client's wish.Ok. The problem you are referring to is something else and needs to be addressed separately. I can create a series with first implement a reliable tx_status based on your recommendation above. Then, change the current behavior so that client callback is always executed as you requested. After that this patch to fix the free order.
-- ~Vinod