git: ac4174e064f4 - main - ibcore: Do not expose unsupported counters.

[Hans Petter Selasky]

The branch main has been updated by hselasky:

URL: https://cgit.FreeBSD.org/src/commit/?id=ac4174e064f447ed3b19a8b395625b7d2b3739d1

commit ac4174e064f447ed3b19a8b395625b7d2b3739d1
Author:     Hans Petter Selasky <hselasky at FreeBSD.org>
AuthorDate: 2021-06-16 13:01:40 +0000
Commit:     Hans Petter Selasky <hselasky at FreeBSD.org>
CommitDate: 2021-07-12 12:22:31 +0000

    ibcore: Do not expose unsupported counters.
    
    If the provider driver (such as rdma_rxe) doesn't support PMA counters,
    avoid exposing its directory similar to optional hw_counters directory.
    If core fails to read the PMA counter, return an error so that user can
    retry later if needed.
    
    Linux commit:
    0f6ef65d1c6ec8deb5d0f11f86631ec4cfe8f22e
    
    MFC after:      1 week
    Reviewed by:    kib
    Sponsored by:   Mellanox Technologies // NVIDIA Networking
---
 sys/ofed/drivers/infiniband/core/ib_sysfs.c | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/sys/ofed/drivers/infiniband/core/ib_sysfs.c b/sys/ofed/drivers/infiniband/core/ib_sysfs.c
index 64ef4c4aefdb..c393bb64a034 100644
--- a/sys/ofed/drivers/infiniband/core/ib_sysfs.c
+++ b/sys/ofed/drivers/infiniband/core/ib_sysfs.c
@@ -520,7 +520,7 @@ static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
 	ret = get_perf_mad(p->ibdev, p->port_num, tab_attr->attr_id, &data,
 			40 + offset / 8, sizeof(data));
 	if (ret < 0)
-		return sprintf(buf, "N/A (no PMA)\n");
+		return ret;
 
 	switch (width) {
 	case 4:
@@ -1043,10 +1043,12 @@ static int add_port(struct ib_device *device, int port_num,
 		goto err_put;
 	}
 
-	p->pma_table = get_counter_table(device, port_num);
-	ret = sysfs_create_group(&p->kobj, p->pma_table);
-	if (ret)
-		goto err_put_gid_attrs;
+	if (device->process_mad) {
+		p->pma_table = get_counter_table(device, port_num);
+		ret = sysfs_create_group(&p->kobj, p->pma_table);
+		if (ret)
+			goto err_put_gid_attrs;
+	}
 
 	p->gid_group.name  = "gids";
 	p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
@@ -1158,7 +1160,8 @@ err_free_gid:
 	p->gid_group.attrs = NULL;
 
 err_remove_pma:
-	sysfs_remove_group(&p->kobj, p->pma_table);
+	if (p->pma_table)
+		sysfs_remove_group(&p->kobj, p->pma_table);
 
 err_put_gid_attrs:
 	kobject_put(&p->gid_attr_group->kobj);
@@ -1270,7 +1273,9 @@ static void free_port_list_attributes(struct ib_device *device)
 			kfree(port->hw_stats);
 			free_hsag(&port->kobj, port->hw_stats_ag);
 		}
-		sysfs_remove_group(p, port->pma_table);
+
+		if (port->pma_table)
+			sysfs_remove_group(p, port->pma_table);
 		sysfs_remove_group(p, &port->pkey_group);
 		sysfs_remove_group(p, &port->gid_group);
 		sysfs_remove_group(&port->gid_attr_group->kobj,