lkml.org 
[lkml]   [2016]   [Aug]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] dmaengine: qcom_hidma: release the descriptor before the callback
From
Date
On 8/10/2016 1:28 PM, Vinod Koul wrote:
>> That's why, I preferred not to call the callback when I observe an error which I
>> > 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?

What should I do if code reaches to the size limit?

Size the error cookie list double the size of available descriptors?


>> Again, it will be a different patch than this one. I think v2 of this patch
>> > needs to go in as it is.
>> >
>> > https://lkml.org/lkml/2016/7/31/64
> I 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.

--
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.

\
 
 \ /
  Last update: 2016-08-10 23:21    [W:0.080 / U:3.500 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site