From 1a6600be3e5dafe2ddcc5d969d931c2591eed896 Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Tue, 3 Oct 2006 01:14:50 -0700 Subject: [PATCH] [PATCH] fbdev: Honor the return value of device_create_file Check the return value of device_create_file(). If return is 'fail', remove attributes by calling device_remove_file(). Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/fbsysfs.c | 35 ++++++++++++++++++++++++++++------- include/linux/fb.h | 1 + 2 files changed, 29 insertions(+), 7 deletions(-) diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c index c151dcf687..d3a50417ed 100644 --- a/drivers/video/fbsysfs.c +++ b/drivers/video/fbsysfs.c @@ -20,6 +20,8 @@ #include #include +#define FB_SYSFS_FLAG_ATTR 1 + /** * framebuffer_alloc - creates a new frame buffer info structure * @@ -483,12 +485,27 @@ static struct class_device_attribute class_device_attrs[] = { int fb_init_class_device(struct fb_info *fb_info) { - unsigned int i; + int i, error = 0; + class_set_devdata(fb_info->class_device, fb_info); - for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) - class_device_create_file(fb_info->class_device, - &class_device_attrs[i]); + fb_info->class_flag |= FB_SYSFS_FLAG_ATTR; + + for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) { + error = class_device_create_file(fb_info->class_device, + &class_device_attrs[i]); + + if (error) + break; + } + + if (error) { + while (--i >= 0) + class_device_remove_file(fb_info->class_device, + &class_device_attrs[i]); + fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR; + } + return 0; } @@ -496,9 +513,13 @@ void fb_cleanup_class_device(struct fb_info *fb_info) { unsigned int i; - for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) - class_device_remove_file(fb_info->class_device, - &class_device_attrs[i]); + if (fb_info->class_flag & FB_SYSFS_FLAG_ATTR) { + for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) + class_device_remove_file(fb_info->class_device, + &class_device_attrs[i]); + + fb_info->class_flag &= ~FB_SYSFS_FLAG_ATTR; + } } #ifdef CONFIG_FB_BACKLIGHT diff --git a/include/linux/fb.h b/include/linux/fb.h index 37aab314f0..3e69241e6a 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -776,6 +776,7 @@ struct fb_info { struct fb_ops *fbops; struct device *device; struct class_device *class_device; /* sysfs per device attrs */ + int class_flag; /* private sysfs flags */ #ifdef CONFIG_FB_TILEBLITTING struct fb_tile_ops *tileops; /* Tile Blitting */ #endif -- 2.20.1