[02/05] Driver Core: Early platform driver buffer

Commit Message

Magnus Damm Nov. 5, 2009, 2:35 p.m. UTC

None

Patch

--- 0001/drivers/base/platform.c
+++ work/drivers/base/platform.c	2009-11-05 23:18:06.000000000 +0900
@@ -1000,7 +1000,7 @@  static __initdata LIST_HEAD(early_platfo
 int __init early_platform_driver_register(struct early_platform_driver *epdrv,
 					  char *buf)
 {
-	unsigned long index;
+	char *tmp;
 	int n;
 
 	/* Simply add the driver to the end of the global list.
@@ -1019,13 +1019,28 @@  int __init early_platform_driver_registe
 	if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) {
 		list_move(&epdrv->list, &early_platform_driver_list);
 
-		if (!strcmp(buf, epdrv->pdrv->driver.name))
+		/* Allow passing parameters after device name */
+		if (buf[n] == '\0' || buf[n] == ',')
 			epdrv->requested_id = -1;
-		else if (buf[n] == '.' && strict_strtoul(&buf[n + 1], 10,
-							 &index) == 0)
-			epdrv->requested_id = index;
-		else
-			epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
+		else {
+			epdrv->requested_id = simple_strtoul(&buf[n + 1],
+							     &tmp, 10);
+
+			if (buf[n] != '.' || (tmp == &buf[n + 1])) {
+				epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
+				n = 0;
+			} else
+				n += strcspn(&buf[n + 1], ",") + 1;
+		}
+
+		if (buf[n] == ',')
+			n++;
+
+		if (epdrv->bufsize) {
+			memcpy(epdrv->buffer, &buf[n],
+			       min_t(int, epdrv->bufsize, strlen(&buf[n]) + 1));
+			epdrv->buffer[epdrv->bufsize - 1] = '\0';
+		}
 	}
 
 	return 0;
--- 0001/include/linux/platform_device.h
+++ work/include/linux/platform_device.h	2009-11-05 22:24:51.000000000 +0900
@@ -83,6 +83,8 @@  struct early_platform_driver {
 	struct platform_driver *pdrv;
 	struct list_head list;
 	int requested_id;
+	char *buffer;
+	int bufsize;
 };
 
 #define EARLY_PLATFORM_ID_UNSET -2
@@ -102,21 +104,29 @@  extern int early_platform_driver_probe(c
 				       int nr_probe, int user_only);
 extern void early_platform_cleanup(void);
 
+#define early_platform_init(class_string, platdrv)		\
+	early_platform_init_buffer(class_string, platdrv, NULL, 0)
 
 #ifndef MODULE
-#define early_platform_init(class_string, platform_driver)		\
+#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz)	\
 static __initdata struct early_platform_driver early_driver = {		\
 	.class_str = class_string,					\
-	.pdrv = platform_driver,					\
+	.buffer = buf,							\
+	.bufsize = bufsiz,						\
+	.pdrv = platdrv,						\
 	.requested_id = EARLY_PLATFORM_ID_UNSET,			\
 };									\
-static int __init early_platform_driver_setup_func(char *buf)		\
+static int __init early_platform_driver_setup_func(char *buffer)	\
 {									\
-	return early_platform_driver_register(&early_driver, buf);	\
+	return early_platform_driver_register(&early_driver, buffer);	\
 }									\
 early_param(class_string, early_platform_driver_setup_func)
 #else /* MODULE */
-#define early_platform_init(class_string, platform_driver)
+#define early_platform_init_buffer(class_string, platdrv, buf, bufsiz)	\
+static inline char *early_platform_driver_setup_func(void)		\
+{									\
+	return bufsiz ? buf : NULL;					\
+}
 #endif /* MODULE */
 
 #endif /* _PLATFORM_DEVICE_H_ */