sound: read i_size with i_size_read()

Convert direct read of inode->i_size to using i_size_read().
i_size_read is guaranteed to return a valid value and
its caller does not need to use addtional locking.
Signed-off-by: Xiaochen Wang <wangxiaochen0@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/sound_firmware.c

@@ -19,7 +19,7 @@ static int do_mod_firmware_load(const char *fn, char **fp)
 		printk(KERN_INFO "Unable to load '%s'.\n", fn);
 		return 0;
 	}
-	l = filp->f_path.dentry->d_inode->i_size;
+	l = i_size_read(filp->f_path.dentry->d_inode);
 	if (l <= 0 || l > 131072)
 	{
 		printk(KERN_INFO "Invalid firmware '%s'\n", fn);