Messages in this thread | | | Date | Fri, 2 Aug 2019 23:07:32 +0530 | From | Vinod Koul <> | Subject | Re: [alsa-devel] [RFC PATCH 06/40] soundwire: intel: prevent possible dereference in hw_params |
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On 02-08-19, 11:52, Pierre-Louis Bossart wrote: > > > On 8/2/19 10:57 AM, Vinod Koul wrote: > > On 02-08-19, 10:16, Pierre-Louis Bossart wrote: > > > > > > > > > On 8/2/19 6:55 AM, Vinod Koul wrote: > > > > On 25-07-19, 18:39, Pierre-Louis Bossart wrote: > > > > > This should not happen in production systems but we should test for > > > > > all callback arguments before invoking the config_stream callback. > > > > > > > > so you are saying callback arg is mandatory, if so please document that > > > > assumption > > > > > > no, what this says is that if a config_stream is provided then it needs to > > > have a valid argument. > > > > well typically args are not mandatory.. > > > > > I am not sure what you mean by "document that assumption", comment in the > > > code (where?) or SoundWire documentation? > > > > The callback documentation which in this is in include/linux/soundwire/sdw_intel.h > > > > /** > * struct sdw_intel_ops: Intel audio driver callback ops > * > * @config_stream: configure the stream with the hw_params > */ > struct sdw_intel_ops { > int (*config_stream)(void *arg, void *substream, > void *dai, void *hw_params, int stream_num); > }; > > all parameters are mandatory really, not sure what you are trying to get at.
It would be good to make a note that argument is mandatory!
Thanks -- ~Vinod
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