Re: [PATCH v3 1/3] dmaengine: imx-sdma: fix buffer ownership

[Philipp Puschmann]

Hi Fabio,


Am 19.09.19 um 13:37 schrieb Fabio Estevam:
> Hi Philipp,
> 
> On Thu, Sep 19, 2019 at 7:45 AM Philipp Puschmann
> <philipp.puschmann@xxxxxxxxx> wrote:
>>
>> BD_DONE flag marks ownership of the buffer. When 1 SDMA owns the
>> buffer, when 0 ARM owns it. When processing the buffers in
>> sdma_update_channel_loop the ownership of the currently processed
>> buffer was set to SDMA again before running the callback function of
>> the buffer and while the sdma script may be running in parallel. So
>> there was the possibility to get the buffer overwritten by SDMA before
>> it has been processed by kernel leading to kind of random errors in the
>> upper layers, e.g. bluetooth.
>>
>> Fixes: broken since start
> 
> The Fixes tag requires a commit ID like this:
> 
> Fixes: 1ec1e82f2510 ("dmaengine: Add Freescale i.MX SDMA support")
> 
> Same applies to the other patch.
> 
oh okay, thanks. I will fix this with v4.

Regards,
Philipp