qeth: Remove BUG_ONs

Remove BUG_ONs or convert to WARN_ON_ONCE/WARN_ONs since a failure within a
networking device driver is no reason to shut down the entire machine.

Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Reviewed-by: Ursula Braun <ursula.braun@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 10 insertions, 14 deletions

diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index b904c8c7bc1d..638a57f4d8a1 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -383,7 +383,7 @@ static inline void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q,
                                 qeth_release_skbs(c);
 
                                 c = f->next_pending;
-                                BUG_ON(head->next_pending != f);
+                                WARN_ON_ONCE(head->next_pending != f);
                                 head->next_pending = c;
                                 kmem_cache_free(qeth_qdio_outbuf_cache, f);
                         } else {
@@ -415,13 +415,12 @@ static inline void qeth_qdio_handle_aob(struct qeth_card *card,
         buffer = (struct qeth_qdio_out_buffer *) aob->user1;
         QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 
-        BUG_ON(buffer == NULL);
-
         if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
                            QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
                 notification = TX_NOTIFY_OK;
         } else {
-                BUG_ON(atomic_read(&buffer->state) != QETH_QDIO_BUF_PENDING);
+                WARN_ON_ONCE(atomic_read(&buffer->state) !=
+                                                        QETH_QDIO_BUF_PENDING);
                 atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
                 notification = TX_NOTIFY_DELAYED_OK;
         }
@@ -1131,7 +1130,7 @@ static void qeth_release_skbs(struct qeth_qdio_out_buffer *buf)
                 notify_general_error = 1;
 
         /* release may never happen from within CQ tasklet scope */
-        BUG_ON(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
+        WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
 
         skb = skb_dequeue(&buf->skb_list);
         while (skb) {
@@ -2400,7 +2399,7 @@ static int qeth_alloc_qdio_buffers(struct qeth_card *card)
                 card->qdio.out_qs[i]->queue_no = i;
                 /* give outbound qeth_qdio_buffers their qdio_buffers */
                 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; ++j) {
-                        BUG_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
+                        WARN_ON(card->qdio.out_qs[i]->bufs[j] != NULL);
                         if (qeth_init_qdio_out_buf(card->qdio.out_qs[i], j))
                                 goto out_freeoutqbufs;
                 }
@@ -3565,7 +3564,7 @@ void qeth_qdio_output_handler(struct ccw_device *ccwdev,
                 if (queue->bufstates &&
                     (queue->bufstates[bidx].flags &
                      QDIO_OUTBUF_STATE_FLAG_PENDING) != 0) {
-                        BUG_ON(card->options.cq != QETH_CQ_ENABLED);
+                        WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
 
                         if (atomic_cmpxchg(&buffer->state,
                                            QETH_QDIO_BUF_PRIMED,
@@ -3579,7 +3578,6 @@ void qeth_qdio_output_handler(struct ccw_device *ccwdev,
                         QETH_CARD_TEXT(queue->card, 5, "aob");
                         QETH_CARD_TEXT_(queue->card, 5, "%lx",
                                         virt_to_phys(buffer->aob));
-                        BUG_ON(bidx < 0 || bidx >= QDIO_MAX_BUFFERS_PER_Q);
                         if (qeth_init_qdio_out_buf(queue, bidx)) {
                                 QETH_CARD_TEXT(card, 2, "outofbuf");
                                 qeth_schedule_recovery(card);
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 83849c290337..73195553f84b 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -411,7 +411,7 @@ static int qeth_l2_process_inbound_buffer(struct qeth_card *card,
         unsigned int len;
 
         *done = 0;
-        BUG_ON(!budget);
+        WARN_ON_ONCE(!budget);
         while (budget) {
                 skb = qeth_core_get_next_skb(card,
                         &card->qdio.in_q->bufs[card->rx.b_index],
@@ -973,7 +973,6 @@ static int __qeth_l2_set_online(struct ccwgroup_device *gdev, int recovery_mode)
         int rc = 0;
         enum qeth_card_states recover_flag;
 
-        BUG_ON(!card);
         mutex_lock(&card->discipline_mutex);
         mutex_lock(&card->conf_mutex);
         QETH_DBF_TEXT(SETUP, 2, "setonlin");
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index e4171a944b94..6e5eef01e667 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1939,7 +1939,7 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
         __u16 magic;
 
         *done = 0;
-        BUG_ON(!budget);
+        WARN_ON_ONCE(!budget);
         while (budget) {
                 skb = qeth_core_get_next_skb(card,
                         &card->qdio.in_q->bufs[card->rx.b_index],
@@ -3334,7 +3334,6 @@ static int __qeth_l3_set_online(struct ccwgroup_device *gdev, int recovery_mode)
         int rc = 0;
         enum qeth_card_states recover_flag;
 
-        BUG_ON(!card);
         mutex_lock(&card->discipline_mutex);
         mutex_lock(&card->conf_mutex);
         QETH_DBF_TEXT(SETUP, 2, "setonlin");
@@ -3715,9 +3714,9 @@ static void qeth_l3_unregister_notifiers(void)
 {
 
         QETH_DBF_TEXT(SETUP, 5, "unregnot");
-        BUG_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
+        WARN_ON(unregister_inetaddr_notifier(&qeth_l3_ip_notifier));
 #ifdef CONFIG_QETH_IPV6
-        BUG_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
+        WARN_ON(unregister_inet6addr_notifier(&qeth_l3_ip6_notifier));
 #endif /* QETH_IPV6 */
 }