Re: [PATCH 1/2 v2] mfd/ab3550: Convert to kstrtou8_from_user

From: Peter Hüwe
Date: Mon Jun 20 2011 - 16:16:28 EST

Am Montag 20 Juni 2011, 21:50:38 schrieb Alexey Dobriyan:
> On Mon, Jun 20, 2011 at 09:46:28PM +0200, Peter Huewe wrote:
> > - char buf[32];
> > - int buf_size;
> > - unsigned long user_address;
> > + u8 user_address;

> > + /* Get userspace string and convert to number */
> > + err = kstrtou8_from_user(user_buf, count, 0, &user_address);
> >
> > ab->debug_address = user_address;

> You don't need temporary variable and should write straight to final
> location, because kstrto* functions will never write to result unless it
> was converted successfully.

Alexey thank you very much for your review, hints and most of all patience ;)
The code really gets cleaner and cleaner.

While changing the code (once again ;) and looking at your remarks I also saw
that ab3550->debug_address and ->debug_bank are always casted to u8.

Do you think I could also change the two fields of the struct ab3550 (only
used in this file) to u8 in this patch, too?
This way I could get rid of the u8* cast which is now needed in this case, if
I take you last remark into account.
> err = kstrtou8_from_user(user_buf, count, 0, (u8 *)&ab->debug_address);

And also clean the code from all the other unnecessary u8 casts.

What do you think?
Or split it up into two seperate patches?

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