From: Ursula Braun <ursula.braun@xxxxxxxxxx>
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@xxxxxxxxxx>
---
net/iucv/iucv.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
Index: linux-next-uschi/net/iucv/iucv.c
===================================================================
--- linux-next-uschi.orig/net/iucv/iucv.c
+++ linux-next-uschi/net/iucv/iucv.c
@@ -1768,7 +1768,6 @@ static void iucv_tasklet_fn(unsigned lon
*/
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())
--
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