sfc: remove EFX_BUG_ON_PARANOID, use EFX_WARN_ON_[ONCE_]PARANOID instead

Logically, EFX_BUG_ON_PARANOID can never be correct.  For, BUG_ON should
 only be used if it is not possible to continue without potential harm;
 and since the non-DEBUG driver will continue regardless (as the BUG_ON is
 compiled out), clearly the BUG_ON cannot be needed in the DEBUG driver.
So, replace every EFX_BUG_ON_PARANOID with either an EFX_WARN_ON_PARANOID
 or the newly defined EFX_WARN_ON_ONCE_PARANOID.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 7893a73..5f4ad4f 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -335,7 +335,7 @@ void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic)
 
 	/* Calculate current fill level, and exit if we don't need to fill */
 	fill_level = (rx_queue->added_count - rx_queue->removed_count);
-	EFX_BUG_ON_PARANOID(fill_level > rx_queue->efx->rxq_entries);
+	EFX_WARN_ON_ONCE_PARANOID(fill_level > rx_queue->efx->rxq_entries);
 	if (fill_level >= rx_queue->fast_fill_trigger)
 		goto out;
 
@@ -347,7 +347,7 @@ void efx_fast_push_rx_descriptors(struct efx_rx_queue *rx_queue, bool atomic)
 
 	batch_size = efx->rx_pages_per_batch * efx->rx_bufs_per_page;
 	space = rx_queue->max_fill - fill_level;
-	EFX_BUG_ON_PARANOID(space < batch_size);
+	EFX_WARN_ON_ONCE_PARANOID(space < batch_size);
 
 	netif_vdbg(rx_queue->efx, rx_status, rx_queue->efx->net_dev,
 		   "RX queue %d fast-filling descriptor ring from"
@@ -475,7 +475,7 @@ static struct sk_buff *efx_rx_mk_skb(struct efx_channel *channel,
 		return NULL;
 	}
 
-	EFX_BUG_ON_PARANOID(rx_buf->len < hdr_len);
+	EFX_WARN_ON_ONCE_PARANOID(rx_buf->len < hdr_len);
 
 	memcpy(skb->data + efx->rx_ip_align, eh - efx->rx_prefix_size,
 	       efx->rx_prefix_size + hdr_len);
@@ -682,7 +682,7 @@ int efx_probe_rx_queue(struct efx_rx_queue *rx_queue)
 
 	/* Create the smallest power-of-two aligned ring */
 	entries = max(roundup_pow_of_two(efx->rxq_entries), EFX_MIN_DMAQ_SIZE);
-	EFX_BUG_ON_PARANOID(entries > EFX_MAX_DMAQ_SIZE);
+	EFX_WARN_ON_PARANOID(entries > EFX_MAX_DMAQ_SIZE);
 	rx_queue->ptr_mask = entries - 1;
 
 	netif_dbg(efx, probe, efx->net_dev,