Re: [PATCH] driver core: Add the ability to unbind drivers to devices from userspace

Greg KH
2005-07-26T01:54:18Z

On Mon, Jul 25, 2005 at 08:56:17PM -0400, Jon Smirl wrote:
> On 7/25/05, Greg KH <greg@kroah.com> wrote:
> > On Mon, Jul 25, 2005 at 08:28:10PM -0400, Jon Smirl wrote:
> > > I didn't realize that echo was adding the CR, I thought that it always
> > > appeared on the end of a sysfs attribute set. So now I have to go add
> > > white space stripping to a dozen fbdev/drm sysfs attribute
> > > implementations. Given that the param is const I may have to allocate
> > > new buffers and copy. I also wonder how many other people have made
> > > the same mistake.
> >
> > Nah, just zero out that \n character :)
>
> The input buffer is "const char * buf". I will have to override the
> const to zero it out.

Yeah, hence the ":)" above.

> > > Are you sure it would break other things? These are supposed to be
> > > text attributes, not binary ones.
> >
> > I agree, I don't know what would break. Care to make a patch so we
> > could find out?
>
> I'll put one together to trim leading/trailing white space from the
> buffer before it is passed into the attribute functions. Now that I
> think about this I believe the attributes should have always had the
> leading/trailing white space removed. If we don't do it in the sysfs
> code then every driver has to do it.

Ok, sounds good.

thanks,

greg k-h