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authorAntonino A. Daplas <adaplas@gmail.com>2006-10-03 01:14:50 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-03 08:04:10 -0700
commit1a6600be3e5dafe2ddcc5d969d931c2591eed896 (patch)
tree453d3d63fce8f1092f21546a4c00d350cfe04fdd
parent928e964f262b522dad57483108f62d87c52ccf82 (diff)
[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 <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/video/fbsysfs.c35
-rw-r--r--include/linux/fb.h1
2 files changed, 29 insertions, 7 deletions
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c
index c151dcf6878..d3a50417ed9 100644
--- a/drivers/video/fbsysfs.c
+++ b/drivers/video/fbsysfs.c
@@ -20,6 +20,8 @@
#include <linux/console.h>
#include <linux/module.h>
+#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 37aab314f0c..3e69241e6a8 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