drivers/dax/bus.c

102 	ssize_t rc = count;
121 				rc = -ENOMEM;
129 	if (rc < 0)
130 		return rc;
132 		rc = driver_attach(drv);
133 	if (rc)
134 		return rc;
208 	int rc;
211 	rc = down_read_interruptible(&dax_dev_rwsem);
212 	if (rc)
213 		return rc;
220 	rc = dax_drv->probe(dev_dax);
222 	if (rc || is_static(dax_region))
223 		return rc;
317 	int rc;
319 	rc = down_read_interruptible(&dax_region_rwsem);
320 	if (rc)
321 		return rc;
334 	ssize_t rc;
339 	rc = down_read_interruptible(&dax_region_rwsem);
340 	if (rc)
341 		return rc;
343 	rc = sysfs_emit(buf, "%s\n", seed ? dev_name(seed) : "");
346 	return rc;
355 	ssize_t rc;
360 	rc = down_read_interruptible(&dax_region_rwsem);
361 	if (rc)
362 		return rc;
364 	rc = sysfs_emit(buf, "%s\n", youngest ? dev_name(youngest) : "");
367 	return rc;
377 	ssize_t rc;
383 	rc = kstrtoint(buf, 0, &val);
384 	if (rc)
385 		return rc;
389 	rc = down_write_killable(&dax_region_rwsem);
390 	if (rc)
391 		return rc;
394 		rc = -ENOSPC;
405 			rc = PTR_ERR(dev_dax);
417 			rc = len;
422 	return rc;
508 	int rc = dev_dax->id;
518 	return rc;
523 	int rc;
525 	rc = down_write_killable(&dax_dev_rwsem);
526 	if (rc)
527 		return rc;
528 	rc = __free_dev_dax_id(dev_dax);
530 	return rc;
554 	int rc;
563 	rc = down_write_killable(&dax_region_rwsem);
564 	if (rc)
565 		return rc;
566 	rc = down_write_killable(&dax_dev_rwsem);
567 	if (rc) {
569 		return rc;
573 		rc = -EBUSY;
583 			rc = len;
589 			rc = -EBUSY;
599 	return rc;
739 	int rc;
741 	rc = down_write_killable(&dax_region_rwsem);
742 	if (rc)
761 	ssize_t rc;
766 	rc = sysfs_emit(buf, "%#llx\n", dax_range->range.start);
769 	return rc;
777 	ssize_t rc;
782 	rc = sysfs_emit(buf, "%#llx\n", dax_range->range.end);
785 	return rc;
793 	ssize_t rc;
798 	rc = sysfs_emit(buf, "%#lx\n", dax_range->pgoff);
801 	return rc;
831 	int rc;
855 	rc = device_add(dev);
856 	if (rc) {
858 		return rc;
861 	rc = devm_add_action_or_reset(dax_region->dev, unregister_dax_mapping,
863 	if (rc)
864 		return rc;
877 	int i, rc;
922 	rc = devm_register_dax_mapping(dev_dax, dev_dax->nr_range - 1);
923 	if (rc)
926 	return rc;
936 	int rc;
943 	rc = adjust_resource(res, range->start, size);
944 	if (rc)
945 		return rc;
964 	int rc;
966 	rc = down_write_killable(&dax_dev_rwsem);
967 	if (rc)
968 		return rc;
1059 	int rc;
1085 	rc = -ENOSPC;
1092 			rc = alloc_dev_dax_range(dev_dax, dax_region->res.start, alloc);
1109 			rc = adjust_dev_dax_range(dev_dax, res, resource_size(res) + alloc);
1112 		rc = alloc_dev_dax_range(dev_dax, res->end + 1, alloc);
1115 	if (rc)
1116 		return rc;
1126 	ssize_t rc;
1131 	rc = kstrtoull(buf, 0, &val);
1132 	if (rc)
1133 		return rc;
1140 	rc = down_write_killable(&dax_region_rwsem);
1141 	if (rc)
1142 		return rc;
1144 		rc = -ENXIO;
1147 	rc = down_write_killable(&dax_dev_rwsem);
1148 	if (rc)
1151 	rc = dev_dax_resize(dax_region, dev_dax, val);
1158 	if (rc == 0)
1160 	return rc;
1168 	ssize_t rc = -EINVAL;
1172 		return rc;
1179 	rc = kstrtoull(start, 16, &addr);
1180 	if (rc)
1184 	rc = kstrtoull(end, 16, &addr);
1185 	if (rc)
1191 	return rc;
1201 	ssize_t rc;
1203 	rc = range_parse(buf, len, &r);
1204 	if (rc)
1205 		return rc;
1207 	rc = -ENXIO;
1208 	rc = down_write_killable(&dax_region_rwsem);
1209 	if (rc)
1210 		return rc;
1213 		return rc;
1215 	rc = down_write_killable(&dax_dev_rwsem);
1216 	if (rc) {
1218 		return rc;
1223 		rc = alloc_dev_dax_range(dev_dax, r.start, to_alloc);
1227 	return rc == 0 ? len : rc;
1263 	ssize_t rc;
1265 	rc = kstrtoul(buf, 0, &val);
1266 	if (rc)
1272 	rc = down_write_killable(&dax_region_rwsem);
1273 	if (rc)
1274 		return rc;
1280 	rc = down_write_killable(&dax_dev_rwsem);
1281 	if (rc) {
1283 		return rc;
1286 		rc = -EBUSY;
1292 	rc = dev_dax_validate_align(dev_dax);
1293 	if (rc)
1298 	return rc == 0 ? len : rc;
1366 	int rc;
1368 	rc = kstrtobool(buf, &val);
1369 	if (rc)
1370 		return rc;
1377 	rc = down_write_killable(&dax_dev_rwsem);
1378 	if (rc)
1379 		return rc;
1458 	int rc;
1468 			rc = -EINVAL;
1476 			rc = -EINVAL;
1480 		rc = alloc_dev_dax_id(dev_dax);
1481 		if (rc < 0)
1489 	rc = alloc_dev_dax_range(dev_dax, dax_region->res.start, data->size);
1490 	if (rc)
1500 			rc = -ENOMEM;
1511 		rc = PTR_ERR(dax_dev);
1534 	rc = device_add(dev);
1535 	if (rc) {
1538 		return ERR_PTR(rc);
1541 	rc = devm_add_action_or_reset(dax_region->dev, unregister_dev_dax, dev);
1542 	if (rc)
1543 		return ERR_PTR(rc);
1547 		rc = devm_register_dax_mapping(dev_dax, 0);
1548 		if (rc)
1549 			return ERR_PTR(rc);
1563 	return ERR_PTR(rc);
1569 	int rc;
1571 	rc = down_write_killable(&dax_region_rwsem);
1572 	if (rc)
1573 		return ERR_PTR(rc);