linux-kernel - Re: [PATCH 4/5] ioremap balanced with iounmap for drivers/char/rio/rio

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Date:	Fri, 06 Oct 2006 12:21:55 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Amol Lad <amol@...ismonetworks.com>
Cc:	linux kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH 4/5] ioremap balanced with iounmap for
	drivers/char/rio/rio_linux.c

Ar Gwe, 2006-10-06 am 10:27 +0530, ysgrifennodd Amol Lad:
> Signed-off-by: Amol Lad <amol@...ismonetworks.com>
> ---
>  rio_linux.c |    3 +++
>  1 files changed, 3 insertions(+)
> ---
> diff -uprN -X linux-2.6.19-rc1-orig/Documentation/dontdiff linux-2.6.19-rc1-orig/drivers/char/rio/rio_linux.c linux-2.6.19-rc1/drivers/char/rio/rio_linux.c
> --- linux-2.6.19-rc1-orig/drivers/char/rio/rio_linux.c	2006-10-05 14:00:43.000000000 +0530
> +++ linux-2.6.19-rc1/drivers/char/rio/rio_linux.c	2006-10-05 14:50:00.000000000 +0530
> @@ -1181,6 +1181,9 @@ static void __exit rio_exit(void)
>  		}
>  		/* It is safe/allowed to del_timer a non-active timer */
>  		del_timer(&hp->timer);
> +
> +		if (hp->Caddr)
> +			iounmap(hp->Caddr);
>  	}

I don't think this is sufficient because it may be unmapped earlier on
error but hp->Caddr is not then cleared .

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