unregister_chrdev(): ignore the return value

unregister_chrdev() always returns 0.  There is no need to check the return
value.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 6 deletions

diff --git a/drivers/char/viotape.c b/drivers/char/viotape.c
index db57277117bb..e12275df6ea2 100644
--- a/drivers/char/viotape.c
+++ b/drivers/char/viotape.c
@@ -1098,15 +1098,10 @@ static int chg_state(int index, unsigned char new_state, struct file *file)
 /* Cleanup */
 static void __exit viotap_exit(void)
 {
-        int ret;
-
         remove_proc_entry("iSeries/viotape", NULL);
         vio_unregister_driver(&viotape_driver);
         class_destroy(tape_class);
-        ret = unregister_chrdev(VIOTAPE_MAJOR, "viotape");
-        if (ret < 0)
-                printk(VIOTAPE_KERN_WARN "Error unregistering device: %d\n",
-                                ret);
+        unregister_chrdev(VIOTAPE_MAJOR, "viotape");
         if (viotape_unitinfo)
                 dma_free_coherent(iSeries_vio_dev,
                                 sizeof(viotape_unitinfo[0]) * VIOTAPE_MAX_TAPE,