On Sat, Mar 22, 2003 at 10:24:53AM +0900, Osamu Tomita wrote:
> On Fri, Mar 21, 2003 at 02:57:51PM +0100, Petr Vandrovec wrote:
> > On 21 Mar 03 at 10:46, Osamu Tomita wrote:
> >
> > > I have a aquestion about patch in patch-2.5.65-ac1 for vt.c.
> > > Here is a extracted patch from patch-2.5.65-ac1.
> > > I think it's no need for 2.5.65.
> >
> > There should be none of these two resize_screen calls. If you'll
> > resize non-foreground VT, they'll trigger fbcon_resize with
> > con != visible_con, resizing your display even if they should not.
> >
> > Only the "if (IS_VISIBLE) err = resize_screen(...);" resize should
> > be there (AFAIK), if con_resize follows other con_* APIs: call it
> > only if con is visible, like it is done with putcs and others.
> > > old_origin = origin;
> I understand. But if resize_screen() failed this attempt to kfree
> before kmalloc. Is there case resize_screen success but kmalloc
> fail?
> How about patch bellow.
As I said: currently there is one unconditional call to resize_screen
and one conditional (depending on IS_VISIBLE). Unconditional one
should not be moved around, but removed completely. Look at
fbcon_resize (only con_resize user) implementation, it will do
wrong things if called with non-visible currcons. I believe that
James has this correct in his latest patches.
Petr Vandrovec
vandrove@vc.cvut.cz
>
> --- linux-2.5.65/drivers/char/vt.c.orig 2003-03-18 06:44:42.000000000 +0900
> +++ linux-2.5.65/drivers/char/vt.c 2003-03-22 10:06:49.000000000 +0900
> @@ -736,6 +736,12 @@
> if (!newscreen)
> return -ENOMEM;
>
> + err = resize_screen(currcons, new_cols, new_rows);
> + if (err) {
> + kfree(newscreen);
> + return err;
> + }
> +
> old_rows = video_num_lines;
> old_cols = video_num_columns;
> old_row_size = video_size_row;
> @@ -746,12 +752,6 @@
> video_size_row = new_row_size;
> screenbuf_size = new_screen_size;
>
> - err = resize_screen(currcons, new_cols, new_rows);
> - if (err) {
> - kfree(newscreen);
> - return err;
> - }
> -
> rlth = min(old_row_size, new_row_size);
> rrem = new_row_size - rlth;
> old_origin = origin;
> Regards,
> Osamu Tomita
>
>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Mar 23 2003 - 22:00:40 EST