diff mbox series

[67/99] fbdev/rivafb: Parse option string with struct option_iter

Message ID 20230306160016.4459-68-tzimmermann@suse.de
State Superseded
Headers show
Series fbdev: Fix memory leak in option parsing | expand

Commit Message

Thomas Zimmermann March 6, 2023, 3:59 p.m. UTC
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@suse.de>
---
 drivers/video/fbdev/riva/fbdev.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/drivers/video/fbdev/riva/fbdev.c b/drivers/video/fbdev/riva/fbdev.c
index affb7c5ef69c..d95319bb93cc 100644
--- a/drivers/video/fbdev/riva/fbdev.c
+++ b/drivers/video/fbdev/riva/fbdev.c
@@ -30,6 +30,7 @@ 
  */
 
 #include <linux/aperture.h>
+#include <linux/cmdline.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
@@ -2105,17 +2106,18 @@  static void rivafb_remove(struct pci_dev *pd)
  * ------------------------------------------------------------------------- */
 
 #ifndef MODULE
-static int rivafb_setup(char *options)
+static int rivafb_setup(const char *options)
 {
-	char *this_opt;
+	struct option_iter iter;
+	const char *this_opt;
 
 	NVTRACE_ENTER();
-	if (!options || !*options)
-		return 0;
 
-	while ((this_opt = strsep(&options, ",")) != NULL) {
+	option_iter_init(&iter, options);
+
+	while (option_iter_next(&iter, this_opt)) {
 		if (!strncmp(this_opt, "forceCRTC", 9)) {
-			char *p;
+			const char *p;
 
 			p = this_opt + 9;
 			if (!*p || !*(++p)) continue;
@@ -2144,6 +2146,9 @@  static int rivafb_setup(char *options)
 			mode_option = mode_option_buf;
 		}
 	}
+
+	option_iter_release(&iter);
+
 	NVTRACE_LEAVE();
 	return 0;
 }