staging: most: cdev: fix chrdev_region leak in mod_exit

commit af708900e9a48c0aa46070c8a8cdf0608a1d2025 upstream.

It looks like v4.18-rc1 commit [0] which upstreams mld-1.8.0
commit [1] missed to fix the memory leak in mod_exit function.

Do it now.

[0] aba258b7310167 ("staging: most: cdev: fix chrdev_region leak")
[1] https://github.com/microchip-ais/linux/commit/a2d8f7ae7ea381
    ("staging: most: cdev: fix leak for chrdev_region")

Signed-off-by: Suresh Udipi <sudipi@jp.adit-jv.com>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Acked-by: Christian Gromm <christian.gromm@microchip.com>
Fixes: aba258b73101 ("staging: most: cdev: fix chrdev_region leak")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/most/cdev/cdev.c b/drivers/staging/most/cdev/cdev.c
index 4569838..0b48677 100644 (file)
--- a/drivers/staging/most/cdev/cdev.c
+++ b/drivers/staging/most/cdev/cdev.c
@@ -546,7 +546,7 @@ static void __exit mod_exit(void)
                destroy_cdev(c);
                destroy_channel(c);
        }
-       unregister_chrdev_region(comp.devno, 1);
+       unregister_chrdev_region(comp.devno, CHRDEV_REGION_SIZE);
        ida_destroy(&comp.minor_id);
        class_destroy(comp.class);
 }