[PATCH v2 019/101] fbdev/cyber2000fb: 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 <tzimmerm...@suse.de>
---
 drivers/video/fbdev/cyber2000fb.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/video/fbdev/cyber2000fb.c 
b/drivers/video/fbdev/cyber2000fb.c
index 38c0a6866d76..f21d11a73455 100644
--- a/drivers/video/fbdev/cyber2000fb.c
+++ b/drivers/video/fbdev/cyber2000fb.c
@@ -34,6 +34,7 @@
  * entering standby mode.)
  */
 #include <linux/aperture.h>
+#include <linux/cmdline.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
@@ -1486,17 +1487,14 @@ static void cyberpro_free_fb_info(struct cfb_info *cfb)
  *  video=cyber2000:font:fontname
  */
 #ifndef MODULE
-static int cyber2000fb_setup(char *options)
+static int cyber2000fb_setup(const char *options)
 {
+       struct option_iter iter;
        char *opt;
 
-       if (!options || !*options)
-               return 0;
-
-       while ((opt = strsep(&options, ",")) != NULL) {
-               if (!*opt)
-                       continue;
+       option_iter_init(&iter, options);
 
+       while (option_iter_next(&iter, &opt)) {
                if (strncmp(opt, "font:", 5) == 0) {
                        static char default_font_storage[40];
 
@@ -1508,6 +1506,9 @@ static int cyber2000fb_setup(char *options)
 
                printk(KERN_ERR "CyberPro20x0: unknown parameter: %s\n", opt);
        }
+
+       option_iter_release(&iter);
+
        return 0;
 }
 #endif  /*  MODULE  */
-- 
2.39.2