Commit b7c2aecc authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

iucv: add work_queue cleanup for suspend 



If iucv_work_queue is not empty during kernel freeze, a kernel panic
occurs. This suspend-patch adds flushing of the work queue for
pending connection requests and severing of remaining pending
connections.

Signed-off-by: default avatarUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2c1409a0

net/iucv/iucv.c

+13 −3
Original line number Diff line number Diff line
@@ -1768,7 +1768,6 @@ static void iucv_tasklet_fn(unsigned long ignored) 
 */

static void iucv_work_fn(struct work_struct *work)

{

	typedef void iucv_irq_fn(struct iucv_irq_data *);

	LIST_HEAD(work_queue);

	struct iucv_irq_list *p, *n;
@@ -1878,14 +1877,25 @@ int iucv_path_table_empty(void) 
static int iucv_pm_freeze(struct device *dev)

{

	int cpu;

	struct iucv_irq_list *p, *n;

	int rc = 0;



#ifdef CONFIG_PM_DEBUG

	printk(KERN_WARNING "iucv_pm_freeze\n");

#endif

	iucv_pm_state = IUCV_PM_FREEZING;

	if (iucv_pm_state != IUCV_PM_FREEZING) {

		for_each_cpu_mask_nr(cpu, iucv_irq_cpumask)

		smp_call_function_single(cpu, iucv_block_cpu_almost, NULL, 1);

			smp_call_function_single(cpu, iucv_block_cpu_almost,

						 NULL, 1);

		cancel_work_sync(&iucv_work);

		list_for_each_entry_safe(p, n, &iucv_work_queue, list) {

			list_del_init(&p->list);

			iucv_sever_pathid(p->data.ippathid,

					  iucv_error_no_listener);

			kfree(p);

		}

	}

	iucv_pm_state = IUCV_PM_FREEZING;

	if (dev->driver && dev->driver->pm && dev->driver->pm->freeze)

		rc = dev->driver->pm->freeze(dev);

	if (iucv_path_table_empty())