From 79c4d80b43b8e43684894574a508a871f0c196bf Mon Sep 17 00:00:00 2001 From: Parav Pandit Date: Mon, 16 Oct 2017 08:45:14 +0300 Subject: 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 Reviewed-by: Mark Bloch Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/core/sysfs.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'drivers/infiniband/core') 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, -- cgit v1.2.3-59-g8ed1b