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Commit 10a6c1de authored by Laurent Pinchart's avatar Laurent Pinchart
Browse files

vt8623fb: use display information in info not in var for panning 



We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
parent 8f0246d6

drivers/video/vt8623fb.c

+5 −4
Original line number Diff line number Diff line
@@ -620,13 +620,14 @@ static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *i 
	unsigned int offset;



	/* Calculate the offset */

	if (var->bits_per_pixel == 0) {

		offset = (var->yoffset / 16) * var->xres_virtual + var->xoffset;

	if (info->var.bits_per_pixel == 0) {

		offset = (var->yoffset / 16) * info->var.xres_virtual

		       + var->xoffset;

		offset = offset >> 3;

	} else {

		offset = (var->yoffset * info->fix.line_length) +

			 (var->xoffset * var->bits_per_pixel / 8);

		offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 1);

			 (var->xoffset * info->var.bits_per_pixel / 8);

		offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 1);

	}



	/* Set the offset */