rpmsg: convert to idr_alloc()

Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index aaa6840..a59684b 100644 (file)
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -213,13 +213,10 @@ static struct rpmsg_endpoint *__rpmsg_create_ept(struct virtproc_info *vrp,
                struct rpmsg_channel *rpdev, rpmsg_rx_cb_t cb,
                void *priv, u32 addr)
 {
-       int err, tmpaddr, request;
+       int id_min, id_max, id;
        struct rpmsg_endpoint *ept;
        struct device *dev = rpdev ? &rpdev->dev : &vrp->vdev->dev;
 
-       if (!idr_pre_get(&vrp->endpoints, GFP_KERNEL))
-               return NULL;
-
        ept = kzalloc(sizeof(*ept), GFP_KERNEL);
        if (!ept) {
                dev_err(dev, "failed to kzalloc a new ept\n");
@@ -234,31 +231,28 @@ static struct rpmsg_endpoint *__rpmsg_create_ept(struct virtproc_info *vrp,
        ept->priv = priv;
 
        /* do we need to allocate a local address ? */
-       request = addr == RPMSG_ADDR_ANY ? RPMSG_RESERVED_ADDRESSES : addr;
+       if (addr == RPMSG_ADDR_ANY) {
+               id_min = RPMSG_RESERVED_ADDRESSES;
+               id_max = 0;
+       } else {
+               id_min = addr;
+               id_max = addr + 1;
+       }
 
        mutex_lock(&vrp->endpoints_lock);
 
        /* bind the endpoint to an rpmsg address (and allocate one if needed) */
-       err = idr_get_new_above(&vrp->endpoints, ept, request, &tmpaddr);
-       if (err) {
-               dev_err(dev, "idr_get_new_above failed: %d\n", err);
+       id = idr_alloc(&vrp->endpoints, ept, id_min, id_max, GFP_KERNEL);
+       if (id < 0) {
+               dev_err(dev, "idr_alloc failed: %d\n", id);
                goto free_ept;
        }
-
-       /* make sure the user's address request is fulfilled, if relevant */
-       if (addr != RPMSG_ADDR_ANY && tmpaddr != addr) {
-               dev_err(dev, "address 0x%x already in use\n", addr);
-               goto rem_idr;
-       }
-
-       ept->addr = tmpaddr;
+       ept->addr = id;
 
        mutex_unlock(&vrp->endpoints_lock);
 
        return ept;
 
-rem_idr:
-       idr_remove(&vrp->endpoints, request);
 free_ept:
        mutex_unlock(&vrp->endpoints_lock);
        kref_put(&ept->refcount, __ept_release);