2 files changed, 11 insertions, 25 deletions

diff --git a/driver/aim-cdev/Makefile b/driver/aim-cdev/Makefile
deleted file mode 100644
index c49a1f3..0000000
--- a/driver/aim-cdev/Makefile
+++ /dev/null
@@ -1,18 +0,0 @@
-# Makefile
-#
-
-SRC := $(shell pwd)
-
-obj-m += aim_cdev.o
-aim_cdev-y := cdev.o
-CFLAGS_cdev.o := -I$(src)/../include/
-
-all:
-	$(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules
-
-modules_install:
-	$(MAKE) -C $(KERNEL_SRC) M=$(SRC) modules_install
-
-clean:
-	$(MAKE) -C $(KERNEL_SRC) M=$(SRC) clean
-
diff --git a/driver/aim-cdev/cdev.c b/driver/aim-cdev/cdev.c
index 7f51024..ce0f9fc 100644
--- a/driver/aim-cdev/cdev.c
+++ b/driver/aim-cdev/cdev.c
@@ -99,11 +99,16 @@ static void destroy_cdev(struct aim_channel *c)
 
 	device_destroy(aim_class, c->devno);
 	cdev_del(&c->cdev);
-	kfifo_free(&c->fifo);
 	spin_lock_irqsave(&ch_list_lock, flags);
 	list_del(&c->list);
 	spin_unlock_irqrestore(&ch_list_lock, flags);
+}
+
+static void destroy_channel(struct aim_channel *c)
+{
 	ida_simple_remove(&minor_id, MINOR(c->devno));
+	kfifo_free(&c->fifo);
+	kfree(c);
 }
 
 /**
@@ -170,9 +175,8 @@ static int aim_close(struct inode *inode, struct file *filp)
 		stop_channel(c);
 		mutex_unlock(&c->io_mutex);
 	} else {
-		destroy_cdev(c);
 		mutex_unlock(&c->io_mutex);
-		kfree(c);
+		destroy_channel(c);
 	}
 	return 0;
 }
@@ -242,7 +246,7 @@ static ssize_t
 aim_read(struct file *filp, char __user *buf, size_t count, loff_t *offset)
 {
 	size_t to_copy, not_copied, copied;
-	struct mbo *mbo;
+	struct mbo *mbo = NULL;
 	struct aim_channel *c = filp->private_data;
 
 	mutex_lock(&c->io_mutex);
@@ -337,14 +341,14 @@ static int aim_disconnect_channel(struct most_interface *iface, int channel_id)
 	spin_lock(&c->unlink);
 	c->dev = NULL;
 	spin_unlock(&c->unlink);
+	destroy_cdev(c);
 	if (c->access_ref) {
 		stop_channel(c);
 		wake_up_interruptible(&c->wq);
 		mutex_unlock(&c->io_mutex);
 	} else {
-		destroy_cdev(c);
 		mutex_unlock(&c->io_mutex);
-		kfree(c);
+		destroy_channel(c);
 	}
 	return 0;
 }
@@ -546,7 +550,7 @@ static void __exit mod_exit(void)
 
 	list_for_each_entry_safe(c, tmp, &channel_list, list) {
 		destroy_cdev(c);
-		kfree(c);
+		destroy_channel(c);
 	}
 	class_destroy(aim_class);
 	unregister_chrdev_region(aim_devno, 1);