[QUESTION] staging/easycap fix

[Greg KH]

On Tue, Feb 14, 2012 at 07:01:25PM -0300, Ezequiel García wrote:
> Hi Greg,
> 
> >
> > It's only "recommended" if you have a compiler that doesn't check for
> > such foolish things.
> >
> 
> Understood. Thanks both.
> 
> Another question (hope you don't mind me asking so much):
> 
> I noticed easycap does lots of (redundant?) checks as:
> 
> pvideo_device = video_devdata(file);
> if (!pvideo_device) {
>   return -EFAULT;
> }
> 
> Is this bad, good or doesn't matter?
> (There are more examples where the check is clearly not needed but
> this one makes me doubt a bit)

Depends on what video_devdata() does, and how it could ever be NULL.

> Maybe I'm focusing on small issues (as you already pointed out),
> do you think this kind of patches would be accepted?
> 
> Of course, I would submit separate patches, one for each change:
> 1. split probe function
> 2. remove redundant checks
> 3. clean comment style
> ... and so on.

That sounds great.

> Also, I'm reading driver cx231xx as it's also an usb video capture.
> Do you think it's a good code reference? Can you give me further reference?

I don't know, ask the linux-media developers on their list for a good
reference driver to follow, they would know best.

thanks,

greg k-h