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authorJan Glauber <jang@linux.vnet.ibm.com>2008-08-21 19:46:33 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-08-21 19:46:39 +0200
commit53b41ba7ce4563c33a0449fbcbbd70665477d654 (patch)
tree78aa9a9bb1675aea597bc2b88a3d0ca1a18de129 /drivers/s390/cio
parent8853e505a15f31fe608cb50e038ba2f794eed923 (diff)
downloadlinux-53b41ba7ce4563c33a0449fbcbbd70665477d654.tar.bz2
[S390] qdio: prevent oopsing if qdio_establish fails
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>
Diffstat (limited to 'drivers/s390/cio')
-rw-r--r--drivers/s390/cio/qdio_thinint.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 9291a771d812..ea7f61400267 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -113,7 +113,11 @@ void tiqdio_remove_input_queues(struct qdio_irq *irq_ptr)
struct qdio_q *q;
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);
synchronize_rcu();
}