From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Pinchart Date: Fri, 19 Aug 2011 09:16:08 +0000 Subject: [PATCH 3/7] fbdev: sh_mobile_lcdc: use display information in info for panning Message-Id: <1313745372-20856-4-git-send-email-laurent.pinchart@ideasonboard.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-fbdev@vger.kernel.org We must not use any information in the passed var besides xoffset, yoffset and vmode as otherwise applications might abuse it. Signed-off-by: Laurent Pinchart --- drivers/video/sh_mobile_lcdcfb.c | 24 ++++++++++++------------ 1 files changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c index f9f420d..1ff215c 100644 --- a/drivers/video/sh_mobile_lcdcfb.c +++ b/drivers/video/sh_mobile_lcdcfb.c @@ -877,12 +877,12 @@ static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var, unsigned long base_addr_y, base_addr_c; unsigned long c_offset; - if (!var->nonstd) - new_pan_offset = (var->yoffset * info->fix.line_length) + - (var->xoffset * (info->var.bits_per_pixel / 8)); + if (!info->var.nonstd) + new_pan_offset = var->yoffset * info->fix.line_length + + var->xoffset * (info->var.bits_per_pixel / 8); else - new_pan_offset = (var->yoffset * info->fix.line_length) + - (var->xoffset); + new_pan_offset = var->yoffset * info->fix.line_length + + var->xoffset; if (new_pan_offset = ch->pan_offset) return 0; /* No change, do nothing */ @@ -891,13 +891,13 @@ static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var, /* Set the source address for the next refresh */ base_addr_y = ch->dma_handle + new_pan_offset; - if (var->nonstd) { + if (info->var.nonstd) { /* Set y offset */ - c_offset = (var->yoffset * - info->fix.line_length * - (info->var.bits_per_pixel - 8)) / 8; - base_addr_c = ch->dma_handle + var->xres * var->yres_virtual + - c_offset; + c_offset = var->yoffset * info->fix.line_length + * (info->var.bits_per_pixel - 8) / 8; + base_addr_c = ch->dma_handle + + info->var.xres * info->var.yres_virtual + + c_offset; /* Set x offset */ if (info->var.bits_per_pixel = 24) base_addr_c += 2 * var->xoffset; @@ -923,7 +923,7 @@ static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var, ch->base_addr_c = base_addr_c; lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y); - if (var->nonstd) + if (info->var.nonstd) lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c); if (lcdc_chan_is_sublcd(ch)) -- 1.7.3.4