linux-kernel - Re: [PATCH] ACPI: check mutex release status

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Message-ID: <CAF1ivSbXwb59WjySLrv6ZobqA_H7Jrf8Cq0c3exvVYH69QmKkw@mail.gmail.com>
Date:	Mon, 26 Sep 2011 20:59:19 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	dave@....org
Cc:	Len Brown <lenb@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org
Subject: Re: [PATCH] ACPI: check mutex release status

On Mon, Sep 26, 2011 at 7:39 PM, Davidlohr Bueso <dave@....org> wrote:
> From: Davidlohr Bueso <dave@....org>
>
> If this is not done we have a bogus ACPI_FAILURE() call.
>
> Signed-off-by: Davidlohr Bueso <dave@....org>
> ---
>  drivers/acpi/acpica/nsload.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/acpi/acpica/nsload.c b/drivers/acpi/acpica/nsload.c
> index 5f7dc69..f3070fd 100644
> --- a/drivers/acpi/acpica/nsload.c
> +++ b/drivers/acpi/acpica/nsload.c
> @@ -115,7 +115,7 @@ acpi_ns_load_table(u32 table_index, struct acpi_namespace_node *node)
>        }
>
>       unlock:
> -       (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
> +       status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

No,

The status maybe set before the "goto unlock" statement.

Lin Ming

>
>        if (ACPI_FAILURE(status)) {
>                return_ACPI_STATUS(status);
> --
> 1.7.4.1
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