Commit 6e2a51a0 authored by Hal Rosenstock's avatar Hal Rosenstock Committed by Doug Ledford
Browse files

IB/core: sysfs.c: Fix PerfMgt ClassPortInfo handling

Port number is not part of ClassPortInfo attribute but is
still needed as a parameter when invoking process_mad.

To properly handle this attribute, port_num is added as a
parameter to get_counter_table and get_perf_mad was changed
not to store port_num in the attribute itself when it's
querying the ClassPortInfo attribute.

This handles issue pointed out by Matan Barak <>

Fixes: 145d9c54

 ('IB/core: Display extended counter set if available')
Signed-off-by: default avatarHal Rosenstock <>
Acked-by: default avatarMatan Barak <>
Acked-by: default avatarIra Weiny <>
Reviewed-by: default avatarChristoph Lameter <>
Signed-off-by: default avatarDoug Ledford <>
parent b6aeb980
......@@ -438,7 +438,8 @@ static int get_perf_mad(struct ib_device *dev, int port_num, __be16 attr,
in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
in_mad->mad_hdr.attr_id = attr;
in_mad->data[41] = port_num; /* PortSelect field */
in_mad->data[41] = port_num; /* PortSelect field */
if ((dev->process_mad(dev, IB_MAD_IGNORE_MKEY,
port_num, NULL, NULL,
......@@ -714,11 +715,12 @@ alloc_group_attrs(ssize_t (*show)(struct ib_port *,
* Figure out which counter table to use depending on
* the device capabilities.
static struct attribute_group *get_counter_table(struct ib_device *dev)
static struct attribute_group *get_counter_table(struct ib_device *dev,
int port_num)
struct ib_class_port_info cpi;
if (get_perf_mad(dev, 0, IB_PMA_CLASS_PORT_INFO,
if (get_perf_mad(dev, port_num, IB_PMA_CLASS_PORT_INFO,
&cpi, 40, sizeof(cpi)) >= 0) {
if (cpi.capability_mask && IB_PMA_CLASS_CAP_EXT_WIDTH)
......@@ -776,7 +778,7 @@ static int add_port(struct ib_device *device, int port_num,
goto err_put;
p->pma_table = get_counter_table(device);
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;
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