linux-kernel - Re: [PATCH] vme: tsi148: silence uninitialized variable warning

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Date:	Sat, 10 Oct 2015 22:35:16 +0100
From:	Martyn Welch <martyn@...chs.me.uk>
To:	Dmitry Kalinkin <dmitry.kalinkin@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Manohar Vanga <manohar.vanga@...il.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vme: tsi148: silence uninitialized variable warning

On 5 October 2015 at 04:59, Dmitry Kalinkin <dmitry.kalinkin@...il.com> wrote:
> The warning is a false positive.
>

That seems very likely.

Please could you role this into the original patch (vme: change bus
error handling scheme)?

Martyn

> drivers/vme/bridges/vme_tsi148.c: In function 'tsi148_master_write':
> drivers/vme/bridges/vme_tsi148.c:1358:31: warning: 'handler' may be used uninitialized in this function [-Wmaybe-uninitialized]
>    vme_unregister_error_handler(handler);
>                                ^
> drivers/vme/bridges/vme_tsi148.c: In function 'tsi148_master_read':
> drivers/vme/bridges/vme_tsi148.c:1260:31: warning: 'handler' may be used uninitialized in this function [-Wmaybe-uninitialized]
>    vme_unregister_error_handler(handler);
>                                ^
>
> Fixes: 0b0496625715 ("vme: change bus error handling scheme")
> Signed-off-by: Dmitry Kalinkin <dmitry.kalinkin@...il.com>
> ---
>  drivers/vme/bridges/vme_tsi148.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c
> index d1e383b..6052483 100644
> --- a/drivers/vme/bridges/vme_tsi148.c
> +++ b/drivers/vme/bridges/vme_tsi148.c
> @@ -1186,7 +1186,7 @@ static ssize_t tsi148_master_read(struct vme_master_resource *image, void *buf,
>         int retval, enabled;
>         unsigned long long vme_base, size;
>         u32 aspace, cycle, dwidth;
> -       struct vme_error_handler *handler;
> +       struct vme_error_handler *handler = NULL;
>         struct vme_bridge *tsi148_bridge;
>         void __iomem *addr = image->kern_base + offset;
>         unsigned int done = 0;
> @@ -1276,7 +1276,7 @@ static ssize_t tsi148_master_write(struct vme_master_resource *image, void *buf,
>         unsigned int done = 0;
>         unsigned int count32;
>
> -       struct vme_error_handler *handler;
> +       struct vme_error_handler *handler = NULL;
>         struct vme_bridge *tsi148_bridge;
>         struct tsi148_driver *bridge;
>
> --
> 1.8.3.1
>
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