IB: Add devnode methods to cm_class and umad_class

We want the ucmX, umadX and issmX device nodes to show up under
/dev/infiniband, and additionally ucmX should have mode 0666.  Add
appropriate devnode methods to their class structs for this.

Signed-off-by: Roland Dreier <roland@purestorage.com>

2 files changed, 15 insertions, 0 deletions

diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index f804e28e1ebb..f62f52fb9ece 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -3639,8 +3639,16 @@ static struct kobj_type cm_port_obj_type = {
         .release = cm_release_port_obj
 };
 
+static char *cm_devnode(struct device *dev, mode_t *mode)
+{
+        *mode = 0666;
+        return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
+}
+
 struct class cm_class = {
+        .owner   = THIS_MODULE,
         .name    = "infiniband_cm",
+        .devnode = cm_devnode,
 };
 EXPORT_SYMBOL(cm_class);
 
diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c
index cd1996d0ad08..8d261b6ea5fe 100644
--- a/drivers/infiniband/core/user_mad.c
+++ b/drivers/infiniband/core/user_mad.c
@@ -1176,6 +1176,11 @@ static void ib_umad_remove_one(struct ib_device *device)
         kref_put(&umad_dev->ref, ib_umad_release_dev);
 }
 
+static char *umad_devnode(struct device *dev, mode_t *mode)
+{
+        return kasprintf(GFP_KERNEL, "infiniband/%s", dev_name(dev));
+}
+
 static int __init ib_umad_init(void)
 {
         int ret;
@@ -1194,6 +1199,8 @@ static int __init ib_umad_init(void)
                 goto out_chrdev;
         }
 
+        umad_class->devnode = umad_devnode;
+
         ret = class_create_file(umad_class, &class_attr_abi_version.attr);
         if (ret) {
                 printk(KERN_ERR "user_mad: couldn't create abi_version attribute\n");