[PATCH 62/99] fbdev/ps3fb: Parse option string with struct option_iter

[Thomas Zimmermann]

Use struct option_iter to walk over the individual options in the
driver's option string. Replaces the hand-written strsep() loop with
a clean interface. The helpers for struct option_iter handle empty
option strings and empty options transparently. The struct's _init
and _release functions duplicate and release the option string's
memory buffer as needed.

Done in preparation of constifying the option string.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/video/fbdev/ps3fb.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/video/fbdev/ps3fb.c b/drivers/video/fbdev/ps3fb.c
index 87543411acaf..d7c287089c64 100644
--- a/drivers/video/fbdev/ps3fb.c
+++ b/drivers/video/fbdev/ps3fb.c
@@ -17,6 +17,7 @@
  *  more details.
  */
 
+#include <linux/cmdline.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
@@ -1256,6 +1257,8 @@ static struct ps3_system_bus_driver ps3fb_driver = {
 static int __init ps3fb_setup(void)
 {
 	char *options;
+	struct option_iter iter;
+	const char *this_opt;
 
 #ifdef MODULE
 	return 0;
@@ -1264,16 +1267,9 @@ static int __init ps3fb_setup(void)
 	if (fb_get_options(DEVICE_NAME, &options))
 		return -ENXIO;
 
-	if (!options || !*options)
-		return 0;
-
-	while (1) {
-		char *this_opt = strsep(&options, ",");
+	option_iter_init(&iter, options);
 
-		if (!this_opt)
-			break;
-		if (!*this_opt)
-			continue;
+	while (option_iter_next(&iter, this_opt)) {
 		if (!strncmp(this_opt, "mode:", 5))
 			ps3fb_mode = simple_strtoul(this_opt + 5, NULL, 0);
 		else {
@@ -1288,6 +1284,9 @@ static int __init ps3fb_setup(void)
 			mode_option = mode_option_buf;
 		}
 	}
+
+	option_iter_release(&iter);
+
 	return 0;
 }
 
-- 
2.39.2