[PATCH 30/99] fbdev/gxt4500: Duplicate video-mode option string
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: 2023-03-06 16:02:39
Also in:
dri-devel, lkml
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
Assume that the driver does not own the option string or its substrings and hence duplicate the option string for the video mode. The driver only parses the option string once as part of module initialization, so use a static buffer to store the duplicated mode option. Linux automatically frees the memory upon releasing the module. Done in preparation of constifying the option string. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> --- drivers/video/fbdev/gxt4500.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/video/fbdev/gxt4500.c b/drivers/video/fbdev/gxt4500.c
index 5f42d3d9d6ce..61bc714693f5 100644
--- a/drivers/video/fbdev/gxt4500.c
+++ b/drivers/video/fbdev/gxt4500.c@@ -779,12 +779,28 @@ static struct pci_driver gxt4500_driver = { static int gxt4500_init(void) { +#ifndef MODULE + char *options; +#endif + if (fb_modesetting_disabled("gxt4500")) return -ENODEV; #ifndef MODULE - if (fb_get_options("gxt4500", &mode_option)) + if (fb_get_options("gxt4500", &options)) return -ENODEV; + + do { + static char mode_option_buf[256]; + int ret; + + ret = snprintf(mode_option_buf, sizeof(mode_option_buf), "%s", options); + if (WARN(ret < 0, "gxt4500: ignoring invalid option, ret=%d\n", ret)) + break; + if (WARN(ret >= sizeof(mode_option_buf), "gxt4500: option too long\n")) + break; + mode_option = mode_option_buf; + } while (0); #endif return pci_register_driver(&gxt4500_driver);
--
2.39.2