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authorParav Pandit <parav@mellanox.com>2017-10-16 08:45:14 +0300
committerDoug Ledford <dledford@redhat.com>2017-10-18 12:10:36 -0400
commit79c4d80b43b8e43684894574a508a871f0c196bf (patch)
treea55176331009b6ab29c3834c74b8bbdcc8c98fcd
parentc0348eb069687a2f27c0cd23dafb35918edf9e75 (diff)
IB/core: Fix unable to change lifespan entry for hw_counters
This patch fixes the case where 'lifespan' entry of the hw_counters is not writable. Currently write callback is not exposed for for the hw_counters sysfs operation. Due to this, modifying lifespan value results into permission denied error in below example. echo 10 > /sys/class/infiniband/mlx5_0/ports/1/hw_counters/lifespan -bash: /sys/class/infiniband/mlx5_0/ports/1/hw_counters/lifespan: Permission denied This patch adds the hook to modify any attribute which implements store() operation. Fixes: b40f4757daa1 ("IB/core: Make device counter infrastructure dynamic") Signed-off-by: Parav Pandit <parav@mellanox.com> Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Doug Ledford <dledford@redhat.com>
-rw-r--r--drivers/infiniband/core/sysfs.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index abc5ab581f82..e30d86fa1855 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -108,8 +108,22 @@ static ssize_t port_attr_show(struct kobject *kobj,
return port_attr->show(p, port_attr, buf);
}
+static ssize_t port_attr_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buf, size_t count)
+{
+ struct port_attribute *port_attr =
+ container_of(attr, struct port_attribute, attr);
+ struct ib_port *p = container_of(kobj, struct ib_port, kobj);
+
+ if (!port_attr->store)
+ return -EIO;
+ return port_attr->store(p, port_attr, buf, count);
+}
+
static const struct sysfs_ops port_sysfs_ops = {
- .show = port_attr_show
+ .show = port_attr_show,
+ .store = port_attr_store
};
static ssize_t gid_attr_show(struct kobject *kobj,

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