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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: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ursula Braun 2009-11-12 21:46:27 +00:00 committed by David S. Miller
parent 2c1409a0a2
commit b7c2aecc07
1 changed files with 13 additions and 3 deletions
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16
net/iucv/iucv.c
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@ -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
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);
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;
for_each_cpu_mask_nr(cpu, iucv_irq_cpumask)
smp_call_function_single(cpu, iucv_block_cpu_almost, NULL, 1);
if (dev->driver && dev->driver->pm && dev->driver->pm->freeze)
rc = dev->driver->pm->freeze(dev);
if (iucv_path_table_empty())