[PATCH v2 020/101] fbdev/efifb: Parse option string with struct option_iter
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: 2023-03-09 16:05:26
Also in:
dri-devel, lkml
Subsystem:
efifb framebuffer driver, framebuffer layer, the rest · Maintainers:
Peter Jones, Helge Deller, Linus Torvalds
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/efifb.c | 42 +++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 20 deletions(-)
diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
index a5779fb453a2..be77a76f7d1d 100644
--- a/drivers/video/fbdev/efifb.c
+++ b/drivers/video/fbdev/efifb.c@@ -8,6 +8,7 @@ */ #include <linux/aperture.h> +#include <linux/cmdline.h> #include <linux/kernel.h> #include <linux/efi.h> #include <linux/efi-bgrt.h>
@@ -284,31 +285,32 @@ static const struct fb_ops efifb_ops = { .fb_imageblit = cfb_imageblit, }; -static int efifb_setup(char *options) +static int efifb_setup(const char *options) { + struct option_iter iter; char *this_opt; - if (options && *options) { - while ((this_opt = strsep(&options, ",")) != NULL) { - if (!*this_opt) continue; - - efifb_setup_from_dmi(&screen_info, this_opt); - - if (!strncmp(this_opt, "base:", 5)) - screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); - else if (!strncmp(this_opt, "stride:", 7)) - screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; - else if (!strncmp(this_opt, "height:", 7)) - screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); - else if (!strncmp(this_opt, "width:", 6)) - screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); - else if (!strcmp(this_opt, "nowc")) - mem_flags &= ~EFI_MEMORY_WC; - else if (!strcmp(this_opt, "nobgrt")) - use_bgrt = false; - } + option_iter_init(&iter, options); + + while (option_iter_next(&iter, &this_opt)) { + efifb_setup_from_dmi(&screen_info, this_opt); + + if (!strncmp(this_opt, "base:", 5)) + screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0); + else if (!strncmp(this_opt, "stride:", 7)) + screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4; + else if (!strncmp(this_opt, "height:", 7)) + screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0); + else if (!strncmp(this_opt, "width:", 6)) + screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0); + else if (!strcmp(this_opt, "nowc")) + mem_flags &= ~EFI_MEMORY_WC; + else if (!strcmp(this_opt, "nobgrt")) + use_bgrt = false; } + option_iter_release(&iter); + return 0; }
--
2.39.2