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[S390] qdio: prevent oopsing if qdio_establish fails

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If qdio_establish fails we call qdio_shutdown to cleanup the
qdio subchannel. The tiq_list entry may not be valid at that
time, therefore we must ignore queues with an invalid list entry
in tiqdio_remove_input_queues.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber 2008-08-21 19:46:33 +02:00 committed by Martin Schwidefsky
parent 8853e505a1
commit 53b41ba7ce
1 changed files with 5 additions and 1 deletions
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6
drivers/s390/cio/qdio_thinint.c
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@ -113,7 +113,11 @@ void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr)
struct qdio_q *q; struct qdio_q *q;
int i; int i;
for_each_input_queue(irq_ptr, q, i) { for (i = 0; i < irq_ptr->nr_input_qs; i++) {
q = irq_ptr->input_qs[i];
/* if establish triggered an error */
if (!q || !q->entry.prev || !q->entry.next)
continue;
list_del_rcu(&q->entry); list_del_rcu(&q->entry);
synchronize_rcu(); synchronize_rcu();
} }