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| author | Tejun Heo <htejun@gmail.com> | 2007-06-14 03:45:13 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-11 16:09:03 -0700 |
| commit | 93e3cd8270d036953120eca83610f95d3f7374c6 (patch) | |
| tree | 8f5bc27cd1d7b28cafd4dd2bdbaabf0f16feb6c8 /fs | |
| parent | 7a23ad44047b1084a032bc0d127fe08af024593a (diff) | |
| download | linux-93e3cd8270d036953120eca83610f95d3f7374c6.tar.bz2 | |
sysfs: fix error handling in binattr write()
Error handling in fs/sysfs/bin.c:write() was wrong because size_t
count is used to receive return value from flush_write() which is
negative on failure.
This patch updates write() such that int variable is used instead.
read() is updated the same way for consistency.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/sysfs/bin.c | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c index d3b9f5f07db1..606267a36275 100644 --- a/fs/sysfs/bin.c +++ b/fs/sysfs/bin.c @@ -33,16 +33,13 @@ fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count) } static ssize_t -read(struct file * file, char __user * userbuf, size_t count, loff_t * off) +read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off) { char *buffer = file->private_data; struct dentry *dentry = file->f_path.dentry; int size = dentry->d_inode->i_size; loff_t offs = *off; - int ret; - - if (count > PAGE_SIZE) - count = PAGE_SIZE; + int count = min_t(size_t, bytes, PAGE_SIZE); if (size) { if (offs > size) @@ -51,15 +48,14 @@ read(struct file * file, char __user * userbuf, size_t count, loff_t * off) count = size - offs; } - ret = fill_read(dentry, buffer, offs, count); - if (ret < 0) - return ret; - count = ret; + count = fill_read(dentry, buffer, offs, count); + if (count < 0) + return count; if (copy_to_user(userbuf, buffer, count)) return -EFAULT; - pr_debug("offs = %lld, *off = %lld, count = %zd\n", offs, *off, count); + pr_debug("offs = %lld, *off = %lld, count = %d\n", offs, *off, count); *off = offs + count; @@ -78,16 +74,15 @@ flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count) return attr->write(kobj, buffer, offset, count); } -static ssize_t write(struct file * file, const char __user * userbuf, - size_t count, loff_t * off) +static ssize_t write(struct file *file, const char __user *userbuf, + size_t bytes, loff_t *off) { char *buffer = file->private_data; struct dentry *dentry = file->f_path.dentry; int size = dentry->d_inode->i_size; loff_t offs = *off; + int count = min_t(size_t, bytes, PAGE_SIZE); - if (count > PAGE_SIZE) - count = PAGE_SIZE; if (size) { if (offs > size) return 0; |