1 files changed, 13 insertions, 45 deletions

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 0c84100acd44..4a199fd93fbd 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1555,48 +1555,16 @@ static loff_t fuse_file_llseek(struct file *file, loff_t offset, int origin)
         loff_t retval;
         struct inode *inode = file->f_path.dentry->d_inode;
 
-        mutex_lock(&inode->i_mutex);
-        if (origin != SEEK_CUR && origin != SEEK_SET) {
-                retval = fuse_update_attributes(inode, NULL, file, NULL);
-                if (retval)
-                        goto exit;
-        }
+        /* No i_mutex protection necessary for SEEK_CUR and SEEK_SET */
+        if (origin == SEEK_CUR || origin == SEEK_SET)
+                return generic_file_llseek(file, offset, origin);
 
-        switch (origin) {
-        case SEEK_END:
-                offset += i_size_read(inode);
-                break;
-        case SEEK_CUR:
-                if (offset == 0) {
-                        retval = file->f_pos;
-                        goto exit;
-                }
-                offset += file->f_pos;
-                break;
-        case SEEK_DATA:
-                if (offset >= i_size_read(inode)) {
-                        retval = -ENXIO;
-                        goto exit;
-                }
-                break;
-        case SEEK_HOLE:
-                if (offset >= i_size_read(inode)) {
-                        retval = -ENXIO;
-                        goto exit;
-                }
-                offset = i_size_read(inode);
-                break;
-        }
-        retval = -EINVAL;
-        if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) {
-                if (offset != file->f_pos) {
-                        file->f_pos = offset;
-                        file->f_version = 0;
-                }
-                retval = offset;
-        }
-exit:
+        mutex_lock(&inode->i_mutex);
+        retval = fuse_update_attributes(inode, NULL, file, NULL);
+        if (!retval)
+                retval = generic_file_llseek(file, offset, origin);
         mutex_unlock(&inode->i_mutex);
+
         return retval;
 }
 
@@ -1808,7 +1776,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
         BUILD_BUG_ON(sizeof(struct fuse_ioctl_iovec) * FUSE_IOCTL_MAX_IOV > PAGE_SIZE);
 
         err = -ENOMEM;
-        pages = kzalloc(sizeof(pages[0]) * FUSE_MAX_PAGES_PER_REQ, GFP_KERNEL);
+        pages = kcalloc(FUSE_MAX_PAGES_PER_REQ, sizeof(pages[0]), GFP_KERNEL);
         iov_page = (struct iovec *) __get_free_page(GFP_KERNEL);
         if (!pages || !iov_page)
                 goto out;
@@ -1958,8 +1926,8 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
 }
 EXPORT_SYMBOL_GPL(fuse_do_ioctl);
 
-static long fuse_file_ioctl_common(struct file *file, unsigned int cmd,
-                                   unsigned long arg, unsigned int flags)
+long fuse_ioctl_common(struct file *file, unsigned int cmd,
+                       unsigned long arg, unsigned int flags)
 {
         struct inode *inode = file->f_dentry->d_inode;
         struct fuse_conn *fc = get_fuse_conn(inode);
@@ -1976,13 +1944,13 @@ static long fuse_file_ioctl_common(struct file *file, unsigned int cmd,
 static long fuse_file_ioctl(struct file *file, unsigned int cmd,
                             unsigned long arg)
 {
-        return fuse_file_ioctl_common(file, cmd, arg, 0);
+        return fuse_ioctl_common(file, cmd, arg, 0);
 }
 
 static long fuse_file_compat_ioctl(struct file *file, unsigned int cmd,
                                    unsigned long arg)
 {
-        return fuse_file_ioctl_common(file, cmd, arg, FUSE_IOCTL_COMPAT);
+        return fuse_ioctl_common(file, cmd, arg, FUSE_IOCTL_COMPAT);
 }
 
 /*