misc/c2port: convert to idr_alloc()

Convert to the much saner new idr interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/misc/c2port/core.c b/drivers/misc/c2port/core.c
index f428d86..f32550a 100644 (file)
--- a/drivers/misc/c2port/core.c
+++ b/drivers/misc/c2port/core.c
@@ -885,7 +885,7 @@ struct c2port_device *c2port_device_register(char *name,
                                        struct c2port_ops *ops, void *devdata)
 {
        struct c2port_device *c2dev;
-       int id, ret;
+       int ret;
 
        if (unlikely(!ops) || unlikely(!ops->access) || \
                unlikely(!ops->c2d_dir) || unlikely(!ops->c2ck_set) || \
@@ -897,22 +897,18 @@ struct c2port_device *c2port_device_register(char *name,
        if (unlikely(!c2dev))
                return ERR_PTR(-ENOMEM);
 
-       ret = idr_pre_get(&c2port_idr, GFP_KERNEL);
-       if (!ret) {
-               ret = -ENOMEM;
-               goto error_idr_get_new;
-       }
-
+       idr_preload(GFP_KERNEL);
        spin_lock_irq(&c2port_idr_lock);
-       ret = idr_get_new(&c2port_idr, c2dev, &id);
+       ret = idr_alloc(&c2port_idr, c2dev, 0, 0, GFP_NOWAIT);
        spin_unlock_irq(&c2port_idr_lock);
+       idr_preload_end();
 
        if (ret < 0)
-               goto error_idr_get_new;
-       c2dev->id = id;
+               goto error_idr_alloc;
+       c2dev->id = ret;
 
        c2dev->dev = device_create(c2port_class, NULL, 0, c2dev,
-                                       "c2port%d", id);
+                                  "c2port%d", c2dev->id);
        if (unlikely(IS_ERR(c2dev->dev))) {
                ret = PTR_ERR(c2dev->dev);
                goto error_device_create;
@@ -946,10 +942,10 @@ error_device_create_bin_file:
 
 error_device_create:
        spin_lock_irq(&c2port_idr_lock);
-       idr_remove(&c2port_idr, id);
+       idr_remove(&c2port_idr, c2dev->id);
        spin_unlock_irq(&c2port_idr_lock);
 
-error_idr_get_new:
+error_idr_alloc:
        kfree(c2dev);
 
        return ERR_PTR(ret);