linux-kernel - Re: [PATCH] habanalabs: silence an uninitialized variable warning

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Date:   Sun, 23 Jan 2022 16:39:23 +0200
From:   Oded Gabbay <ogabbay@...nel.org>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ofir Bitton <obitton@...ana.ai>,
        Yuri Nudelman <ynudelman@...ana.ai>,
        farah kassabri <fkassabri@...ana.ai>,
        Alon Mizrahi <amizrahi@...ana.ai>,
        "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] habanalabs: silence an uninitialized variable warning

On Tue, Jan 11, 2022 at 9:17 AM Dan Carpenter <dan.carpenter@...cle.com> wrote:
>
> Smatch warns that:
>
>     drivers/misc/habanalabs/common/command_buffer.c:471 hl_cb_ioctl()
>     error: uninitialized symbol 'device_va'.
>
> Which is true, but harmless.  Anyway, it's easy to silence this by
> adding a error check.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---
>  drivers/misc/habanalabs/common/command_buffer.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/misc/habanalabs/common/command_buffer.c b/drivers/misc/habanalabs/common/command_buffer.c
> index 3c0ae07a2d80..b9483a3cee91 100644
> --- a/drivers/misc/habanalabs/common/command_buffer.c
> +++ b/drivers/misc/habanalabs/common/command_buffer.c
> @@ -464,6 +464,8 @@ int hl_cb_ioctl(struct hl_fpriv *hpriv, void *data)
>                                 args->in.flags,
>                                 &usage_cnt,
>                                 &device_va);
> +               if (rc)
> +                       break;
>
>                 memset(&args->out, 0, sizeof(args->out));
>
> --
> 2.20.1
>

Thanks!
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Applied to -next.