diff options
| -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 d3b9f5f07db..606267a3627 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; |