[PATCH v2 016/101] fbdev/cirrusfb: 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/cirrusfb.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/video/fbdev/cirrusfb.c b/drivers/video/fbdev/cirrusfb.c
index 85b9442031b3..a5e99a8feadd 100644
--- a/drivers/video/fbdev/cirrusfb.c
+++ b/drivers/video/fbdev/cirrusfb.c
@@ -35,6 +35,7 @@
  */
 
 #include <linux/aperture.h>
+#include <linux/cmdline.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
@@ -2324,17 +2325,14 @@ static struct zorro_driver cirrusfb_zorro_driver = {
 #endif /* CONFIG_ZORRO */
 
 #ifndef MODULE
-static int __init cirrusfb_setup(char *options)
+static int __init cirrusfb_setup(const char *options)
 {
+	struct option_iter iter;
 	char *this_opt;
 
-	if (!options || !*options)
-		return 0;
-
-	while ((this_opt = strsep(&options, ",")) != NULL) {
-		if (!*this_opt)
-			continue;
+	option_iter_init(&iter, options);
 
+	while (option_iter_next(&iter, &this_opt)) {
 		if (!strcmp(this_opt, "noaccel"))
 			noaccel = 1;
 		else {
@@ -2345,6 +2343,9 @@ static int __init cirrusfb_setup(char *options)
 			mode_option = mode_option_buf;
 		}
 	}
+
+	option_iter_release(&iter);
+
 	return 0;
 }
 #endif
-- 
2.39.2