Hi Ionut,
On Thu, Dec 9, 2010 at 4:22 PM, Ionut Nicu <ionut.nicu@xxxxxxxxxx> wrote:
> Hi Omar,
>
> On Thu, 2010-12-09 at 23:47 +0200, Ionut Nicu wrote:
>> Reorganized some code in rmgr/node.c to increase its
>> readability. Most of the changes reduce the code
>> indentation level and simplifiy the code. No functional
>> changes were done.
>
> <snip>
>
>> /*
>> * Check stream mode. Default is STRMMODE_PROCCOPY.
>> */
>> - if (!status && pattrs) {
>> - if (pattrs->strm_mode != STRMMODE_PROCCOPY)
>> - status = -EPERM; /* illegal stream mode */
>> -
>> - }
>> - if (status)
>> - goto func_end;
>> + if (pattrs && pattrs->strm_mode != STRMMODE_PROCCOPY)
>> + return -EPERM; /* illegal stream mode */
>>
>
> While cleaning up and reviewing the code I saw this check, which unless
> it's intentional I think it looks like a bug. See comment below.
>
> <snip>
>> + strm_mode = pattrs ? pattrs->strm_mode : STRMMODE_PROCCOPY;
>> + switch (strm_mode) {
>> + case STRMMODE_RDMA:
>
> ...
>
>> +
>> + case STRMMODE_ZEROCOPY:
>
> ...
>
>> + case STRMMODE_PROCCOPY:
>
> It looks like all modes are handled here although the only one that
> could escape the validation from above is STRMMODE_PROCCOPY.
>
> I tried removing the first check and tested with the
> userspace-dspbridge strmcopy application, but I noticed the DSP hangs if
> I try to use it with anything else than the copy mode.
>
> Are the other modes (rdma, zerocopy) not supported at all?
No, those modes are not supported... the only one working for dsp
streams is proc-copy.
Regards,
Omar
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