linux-kernel - [PATCH 4.19 06/66] staging: most: cdev: fix chrdev_region leak in mod

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Date:   Thu,  9 May 2019 20:41:41 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Suresh Udipi <sudipi@...adit-jv.com>,
        Eugeniu Rosca <erosca@...adit-jv.com>,
        Christian Gromm <christian.gromm@...rochip.com>
Subject: [PATCH 4.19 06/66] staging: most: cdev: fix chrdev_region leak in mod_exit

From: Suresh Udipi <sudipi@...adit-jv.com>

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@...adit-jv.com>
Signed-off-by: Eugeniu Rosca <erosca@...adit-jv.com>
Acked-by: Christian Gromm <christian.gromm@...rochip.com>
Fixes: aba258b73101 ("staging: most: cdev: fix chrdev_region leak")
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/staging/most/cdev/cdev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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);
 }