add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/ntb/ntb_transport.c
..
..
@@ -412,7 +412,7 @@
412
412
 
413
413
 		rc = device_register(dev);
414
414
 		if (rc) {
415
-			kfree(client_dev);
415
+			put_device(dev);
416
416
 			goto err;
417
417
 		}
418
418
 
..
..
@@ -911,7 +911,7 @@
911
911
 	return 0;
912
912
 }
913
913
 
914
-static void ntb_qp_link_down_reset(struct ntb_transport_qp *qp)
914
+static void ntb_qp_link_context_reset(struct ntb_transport_qp *qp)
915
915
 {
916
916
 	qp->link_is_up = false;
917
917
 	qp->active = false;
..
..
@@ -932,6 +932,13 @@
932
932
 	qp->tx_err_no_buf = 0;
933
933
 	qp->tx_memcpy = 0;
934
934
 	qp->tx_async = 0;
935
+}
936
+
937
+static void ntb_qp_link_down_reset(struct ntb_transport_qp *qp)
938
+{
939
+	ntb_qp_link_context_reset(qp);
940
+	if (qp->remote_rx_info)
941
+		qp->remote_rx_info->entry = qp->rx_max_entry - 1;
935
942
 }
936
943
 
937
944
 static void ntb_qp_link_cleanup(struct ntb_transport_qp *qp)
..
..
@@ -1176,7 +1183,7 @@
1176
1183
 	qp->ndev = nt->ndev;
1177
1184
 	qp->client_ready = false;
1178
1185
 	qp->event_handler = NULL;
1179
-	ntb_qp_link_down_reset(qp);
1186
+	ntb_qp_link_context_reset(qp);
1180
1187
 
1181
1188
 	if (mw_num < qp_count % mw_count)
1182
1189
 		num_qps_mw = qp_count / mw_count + 1;
..
..
@@ -2278,8 +2285,12 @@
2278
2285
 	struct ntb_queue_entry *entry;
2279
2286
 	int rc;
2280
2287
 
2281
-	if (!qp || !qp->link_is_up || !len)
2288
+	if (!qp || !len)
2282
2289
 		return -EINVAL;
2290
+
2291
+	/* If the qp link is down already, just ignore. */
2292
+	if (!qp->link_is_up)
2293
+		return 0;
2283
2294
 
2284
2295
 	entry = ntb_list_rm(&qp->ntb_tx_free_q_lock, &qp->tx_free_q);
2285
2296
 	if (!entry) {
..
..
@@ -2420,7 +2431,7 @@
2420
2431
 	unsigned int head = qp->tx_index;
2421
2432
 	unsigned int tail = qp->remote_rx_info->entry;
2422
2433
 
2423
-	return tail > head ? tail - head : qp->tx_max_entry + tail - head;
2434
+	return tail >= head ? tail - head : qp->tx_max_entry + tail - head;
2424
2435
 }
2425
2436
 EXPORT_SYMBOL_GPL(ntb_transport_tx_free_entry);
2426
2437