[PATCH 21/99] fbdev/fm2fb: 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/fm2fb.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/video/fbdev/fm2fb.c b/drivers/video/fbdev/fm2fb.c
index 942e382cf1cf..4f17bc8e6c1d 100644
--- a/drivers/video/fbdev/fm2fb.c
+++ b/drivers/video/fbdev/fm2fb.c
@@ -14,6 +14,7 @@
  *  more details.
  */
 
+#include <linux/cmdline.h>
 #include <linux/module.h>
 #include <linux/mm.h>
 #include <linux/fb.h>
@@ -293,19 +294,22 @@ static int fm2fb_probe(struct zorro_dev *z, const struct zorro_device_id *id)
 	return 0;
 }
 
-static int __init fm2fb_setup(char *options)
+static int __init fm2fb_setup(const char *options)
 {
-	char *this_opt;
+	struct option_iter iter;
+	const char *this_opt;
 
-	if (!options || !*options)
-		return 0;
+	option_iter_init(&iter, options);
 
-	while ((this_opt = strsep(&options, ",")) != NULL) {
+	while (option_iter_next(&iter, this_opt)) {
 		if (!strncmp(this_opt, "pal", 3))
 			fm2fb_mode = FM2FB_MODE_PAL;
 		else if (!strncmp(this_opt, "ntsc", 4))
 			fm2fb_mode = FM2FB_MODE_NTSC;
 	}
+
+	option_iter_release(&iter);
+
 	return 0;
 }
 
-- 
2.39.2