RDMA: Simplify get firmware interface
There is a need to forward FW version to user space
application through RDMA netlink. In order to make it safe, there
is need to declare nla_policy and limit the size of FW string.
The new define IB_FW_VERSION_NAME_MAX will limit the size of
FW version string. That define was chosen to be equal to
ETHTOOL_FWVERS_LEN, because many drivers anyway are limited
by that value indirectly.
The introduction of this define allows us to remove the string size
from get_fw_str function signature.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index 7ebe1ef..abc5ab5 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -1210,8 +1210,8 @@ static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
{
struct ib_device *dev = container_of(device, struct ib_device, dev);
- ib_get_device_fw_str(dev, buf, PAGE_SIZE);
- strlcat(buf, "\n", PAGE_SIZE);
+ ib_get_device_fw_str(dev, buf);
+ strlcat(buf, "\n", IB_FW_VERSION_NAME_MAX);
return strlen(buf);
}