[PATCH] cfag12864b: fix crash when built-in and no parport present

[pandora-kernel.git] / drivers / auxdisplay / cfag12864bfb.c

diff --git a/drivers/auxdisplay/cfag12864bfb.c b/drivers/auxdisplay/cfag12864bfb.c
index 94765e7..66fafbb 100644 (file)
--- a/drivers/auxdisplay/cfag12864bfb.c
+++ b/drivers/auxdisplay/cfag12864bfb.c
@@ -137,7 +137,14 @@ static struct platform_device *cfag12864bfb_device;
 
 static int __init cfag12864bfb_init(void)
 {
-       int ret;
+       int ret = -EINVAL;
+
+       /* cfag12864b_init() must be called first */
+       if (!cfag12864b_isinited()) {
+               printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
+                       "cfag12864b is not initialized\n");
+               goto none;
+       }
 
        if (cfag12864b_enable()) {
                printk(KERN_ERR CFAG12864BFB_NAME ": ERROR: "
@@ -162,6 +169,7 @@ static int __init cfag12864bfb_init(void)
                }
        }
 
+none:
        return ret;
 }