fbdev: sh-mobile-lcdc: fix potential Oops in SH-Mobile LCDC framebuffer driver

sh_mobile_lcdc_setup_clocks() can perform IO, therefore it has to be called
after ioremap(). Also check return code of ioremap() and use resource_size()
instead of open-coding it.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/video/sh_mobile_lcdcfb.c b/drivers/video/sh_mobile_lcdcfb.c
index 12c451a711e9..0c97509d0237 100644
--- a/drivers/video/sh_mobile_lcdcfb.c
+++ b/drivers/video/sh_mobile_lcdcfb.c
@@ -1020,14 +1020,16 @@ static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
                 goto err1;
         }
 
+        priv->base = ioremap_nocache(res->start, resource_size(res));
+        if (!priv->base)
+                goto err1;
+
         error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
         if (error) {
                 dev_err(&pdev->dev, "unable to setup clocks\n");
                 goto err1;
         }
 
-        priv->base = ioremap_nocache(res->start, (res->end - res->start) + 1);
-
         for (i = 0; i < j; i++) {
                 cfg = &priv->ch[i].cfg;