[PATCH v2 065/101] fbdev/pxafb: 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/pxafb.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/video/fbdev/pxafb.c b/drivers/video/fbdev/pxafb.c
index c46ed78298ae..d2db9c20d515 100644
--- a/drivers/video/fbdev/pxafb.c
+++ b/drivers/video/fbdev/pxafb.c
@@ -32,6 +32,7 @@
  *   All Rights Reserved
  */
 
+#include <linux/cmdline.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
@@ -2011,23 +2012,26 @@ static int parse_opt(struct device *dev, char *this_opt,
        return 0;
 }
 
-static int pxafb_parse_options(struct device *dev, char *options,
+static int pxafb_parse_options(struct device *dev, const char *options,
                               struct pxafb_mach_info *inf)
 {
+       struct option_iter iter;
        char *this_opt;
        int ret;
 
-       if (!options || !*options)
-               return 0;
-
        dev_dbg(dev, "options are \"%s\"\n", options ? options : "null");
 
-       /* could be made table driven or similar?... */
-       while ((this_opt = strsep(&options, ",")) != NULL) {
+       option_iter_init(&iter, options);
+
+       while (option_iter_next(&iter, &this_opt)) {
+               /* could be made table driven or similar?... */
                ret = parse_opt(dev, this_opt, inf);
                if (ret)
                        return ret;
        }
+
+       option_iter_release(&iter);
+
        return 0;
 }
 
-- 
2.39.2