Merge branch 'core/topology' of git://git.kernel.org/pub/scm/linux/kernel/git/tip...

[pandora-kernel.git] / drivers / auxdisplay / cfag12864b.c

diff --git a/drivers/auxdisplay/cfag12864b.c b/drivers/auxdisplay/cfag12864b.c
index 889583d..683509f 100644 (file)
--- a/drivers/auxdisplay/cfag12864b.c
+++ b/drivers/auxdisplay/cfag12864b.c
@@ -5,7 +5,7 @@
  *     License: GPLv2
  *     Depends: ks0108
  *
- *      Author: Copyright (C) Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ *      Author: Copyright (C) Miguel Ojeda Sandonis
  *        Date: 2006-10-31
  *
  *  This program is free software; you can redistribute it and/or modify
@@ -311,6 +311,17 @@ EXPORT_SYMBOL_GPL(cfag12864b_enable);
 EXPORT_SYMBOL_GPL(cfag12864b_disable);
 EXPORT_SYMBOL_GPL(cfag12864b_isenabled);
 
+/*
+ * Is the module inited?
+ */
+
+static unsigned char cfag12864b_inited;
+unsigned char cfag12864b_isinited(void)
+{
+       return cfag12864b_inited;
+}
+EXPORT_SYMBOL_GPL(cfag12864b_isinited);
+
 /*
  * Module Init & Exit
  */
@@ -319,6 +330,13 @@ static int __init cfag12864b_init(void)
 {
        int ret = -EINVAL;
 
+       /* ks0108_init() must be called first */
+       if (!ks0108_isinited()) {
+               printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
+                       "ks0108 is not initialized\n");
+               goto none;
+       }
+
        if (PAGE_SIZE < CFAG12864B_SIZE) {
                printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
                        "page size (%i) < cfag12864b size (%i)\n",
@@ -337,7 +355,7 @@ static int __init cfag12864b_init(void)
 
        cfag12864b_cache = kmalloc(sizeof(unsigned char) *
                CFAG12864B_SIZE, GFP_KERNEL);
-       if (cfag12864b_buffer == NULL) {
+       if (cfag12864b_cache == NULL) {
                printk(KERN_ERR CFAG12864B_NAME ": ERROR: "
                        "can't alloc cache buffer (%i bytes)\n",
                        CFAG12864B_SIZE);
@@ -354,6 +372,7 @@ static int __init cfag12864b_init(void)
        cfag12864b_clear();
        cfag12864b_on();
 
+       cfag12864b_inited = 1;
        return 0;
 
 cachealloced:
@@ -379,5 +398,5 @@ module_init(cfag12864b_init);
 module_exit(cfag12864b_exit);
 
 MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@gmail.com>");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <miguel.ojeda.sandonis@gmail.com>");
 MODULE_DESCRIPTION("cfag12864b LCD driver");