[PATCH] floppy cleanup timers/resources on unload

From: Zwane Mwaikambo <zwane@linuxpower.ca>

The floppy driver currently can leave pending timers after unloading
itself.

This bug has a corresponding bugzilla entry at;

http://bugme.osdl.org/show_bug.cgi?id=1061

drivers/block/floppy.c

@@ -219,6 +219,7 @@ static int use_virtual_dma;
  */
 
 static spinlock_t floppy_lock = SPIN_LOCK_UNLOCKED;
+static struct completion device_release;
 
 static unsigned short virtual_dma_port=0x3f0;
 irqreturn_t floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs);
@@ -4203,9 +4204,17 @@ static int __init floppy_setup(char *str)
 
 static int have_no_fdc= -ENODEV;
 
+static void floppy_device_release(struct device *dev)
+{
+	complete(&device_release);
+}
+
 static struct platform_device floppy_device = {
 	.name		= "floppy",
 	.id		= 0,
+	.dev		= {
+			.release = floppy_device_release,
+	}
 };
 
 static struct kobject *floppy_find(dev_t dev, int *part, void *data)
@@ -4576,11 +4585,15 @@ int init_module(void)
 void cleanup_module(void)
 {
 	int drive;
-		
+
+	init_completion(&device_release);
 	platform_device_unregister(&floppy_device);
 	blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256);
 	unregister_blkdev(FLOPPY_MAJOR, "fd");
+
 	for (drive = 0; drive < N_DRIVE; drive++) {
+		del_timer_sync(&motor_off_timer[drive]);
+
 		if ((allowed_drive_mask & (1 << drive)) &&
 		    fdc_state[FDC(drive)].version != FDC_NONE) {
 			del_gendisk(disks[drive]);
@@ -4590,9 +4603,17 @@ void cleanup_module(void)
 	}
 	devfs_remove("floppy");
 
+	del_timer_sync(&fd_timeout);
+	del_timer_sync(&fd_timer);
 	blk_cleanup_queue(floppy_queue);
+
+	if (usage_count)
+		floppy_release_irq_and_dma();
+
 	/* eject disk, if any */
 	fd_eject(0);
+
+	wait_for_completion(&device_release);
 }
 
 MODULE_PARM(floppy,"s");