Re: [patch] staging: panel: pass correct lengths to keypad_send_key()

[Dan Carpenter <dan.carpenter@oracle.com>]

On Fri, Nov 30, 2012 at 10:19:06AM +0100, walter harms wrote:
> >  				if (press_str[0])
> >  					keypad_send_key(press_str,
> > -							sizeof(press_str));
> > +							sizeof(input->u.kbd.press_str));
> >  			}
> yep, this looks like the original intention.
> NTL i would like to question the use of  press_str and friends.
> Moving the if (press_str[0]) into keypad_send_key() seems
> more sensible.
> 
> just my two cents,
> 

Greg had already applied my patch by the you sent this email.

What you're saying sounds like it should be a good cleanup, but when
I actually look at it, the callers still have to test repeat_str[0]
so it's not as useful as one would hope.

Really this stuff is really confusing.  I'm not sure what is
actually stored in press_str.  Is it a pointer or just chars?  If
it's a pointer then why are we only checking the first bit instead
of checking the pointer?  I think it's characters but why is it
declared as "char press_str[sizeof(void *) + sizeof(int)];"?

regards,
dan carpenter