[ACPI] ibm ACPI 0.8 by Chris Wright and Borislav Deianov

Signed-off-by: Len Brown <len.brown@intel.com>

Documentation/ibm-acpi.txt

 		    IBM ThinkPad ACPI Extras Driver
 
-                            Version 0.7
-                          23 October 2004
+                            Version 0.8
+                          8 November 2004
 
                Borislav Deianov <borislav@users.sf.net>
 		      http://ibm-acpi.sf.net/

drivers/acpi/ibm_acpi.c

@@ -43,9 +43,11 @@
  *  2004-10-19	0.6	use acpi_bus_register_driver() to claim HKEY device
  *  2004-10-23	0.7	fix module loading on A21e, A22p, T20, T21, X20
  *			fix LED control on A21e
+ *  2004-11-08	0.8	fix init error case, don't return from a macro
+ *				thanks to Chris Wright <chrisw@osdl.org>
  */
 
-#define IBM_VERSION "0.7"
+#define IBM_VERSION "0.8"
 
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -1130,25 +1132,19 @@ static int ibm_handle_init(char *name,
 			return 0;
 	}
 	
+	*handle = NULL;
+
 	if (required) {
 		printk(IBM_ERR "%s object not found\n", name);
 		return -1;
 	}
 
-	*handle = NULL;
-
 	return 0;
 }
 
-#define IBM_HANDLE_INIT_REQ(object) do {                                      \
-        if (ibm_handle_init(#object, &object##_handle, *object##_parent,      \
-		object##_paths, sizeof(object##_paths)/sizeof(char *), 1) < 0)\
-		return -ENODEV;                                               \
-} while (0)
-
-#define IBM_HANDLE_INIT(object)                                           \
+#define IBM_HANDLE_INIT(object, required)				\
 	ibm_handle_init(#object, &object##_handle, *object##_parent,	\
-		object##_paths, sizeof(object##_paths)/sizeof(char *), 0)
+		object##_paths, sizeof(object##_paths)/sizeof(char*), required)
 
 
 static void ibm_param(char *feature, char *cmd)
@@ -1184,35 +1180,33 @@ static int __init acpi_ibm_init(void)
 	if (acpi_disabled)
 		return -ENODEV;
 
-	proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
-	if (!proc_dir) {
-		printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
+	/* these handles are required */
+	if (IBM_HANDLE_INIT(ec,	  1) < 0 ||
+	    IBM_HANDLE_INIT(hkey, 1) < 0 ||
+	    IBM_HANDLE_INIT(vid,  1) < 0 ||
+	    IBM_HANDLE_INIT(beep, 1) < 0)
 		return -ENODEV;
-	}
-	proc_dir->owner = THIS_MODULE;
 
-	IBM_HANDLE_INIT_REQ(ec);
-	IBM_HANDLE_INIT_REQ(hkey);
-	IBM_HANDLE_INIT_REQ(vid);
-	IBM_HANDLE_INIT(cmos);
-	IBM_HANDLE_INIT(lght);
-	IBM_HANDLE_INIT(dock);
-	IBM_HANDLE_INIT(bay);
-	IBM_HANDLE_INIT(bayej);
-	IBM_HANDLE_INIT(led);
-	IBM_HANDLE_INIT(sysl);
-	IBM_HANDLE_INIT(bled);
-	IBM_HANDLE_INIT_REQ(beep);
-
-	if (!cmos_handle && !lght_handle) {
-		printk(IBM_ERR "neither cmos nor lght object found\n");
+	/* these handles have alternatives */
+	IBM_HANDLE_INIT(lght, 0);
+	if (IBM_HANDLE_INIT(cmos, !lght_handle) < 0)
 		return -ENODEV;
-	}
+	IBM_HANDLE_INIT(sysl, 0);
+	if (IBM_HANDLE_INIT(led, !sysl_handle) < 0)
+		return -ENODEV;
+
+	/* these handles are not required */
+	IBM_HANDLE_INIT(dock,  0);
+	IBM_HANDLE_INIT(bay,   0);
+	IBM_HANDLE_INIT(bayej, 0);
+	IBM_HANDLE_INIT(bled,  0);
 
-	if (!led_handle && !sysl_handle) {
-		printk(IBM_ERR "neither led nor sysl object found\n");
+	proc_dir = proc_mkdir(IBM_DIR, acpi_root_dir);
+	if (!proc_dir) {
+		printk(IBM_ERR "unable to create proc dir %s", IBM_DIR);
 		return -ENODEV;
 	}
+	proc_dir->owner = THIS_MODULE;
 	
 	for (i=0; i<NUM_IBMS; i++) {
 		ret = ibm_init(&ibms[i]);