linux-kernel - Re: [PATCH] 9p bug fix: return non-zero error value in p9_put

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Message-ID: <a4e6962a0809231333x48c1d4b8t1b18eae40cd148ee@mail.gmail.com>
Date:	Tue, 23 Sep 2008 15:33:14 -0500
From:	"Eric Van Hensbergen" <ericvh@...il.com>
To:	"Abhishek Kulkarni" <kulkarni@...l.gov>
Cc:	v9fs-developer@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] 9p bug fix: return non-zero error value in p9_put_data

Hey - first of all, sorry for the long delay on responding to this,
I've just gotten back to my patch queue.

On Tue, Sep 2, 2008 at 2:04 PM, Abhishek Kulkarni <kulkarni@...l.gov> wrote:
> Resubmitting my previous 9p bug fix patch that removes the bogus return
> value in p9_put_data which made every p9_client_write fail.
>
> Signed-off-by: Abhishek Kulkarni <kulkarni@...l.gov>
> ---

Please include the original description when resubmitting patches --
this will allow me to suck it into my tree more effectively.

>
> -static int
> +static void
>  p9_put_data(struct cbuf *bufp, const char *data, int count,
>                   unsigned char **pdata)
>  {
>        *pdata = buf_alloc(bufp, count);
>        memmove(*pdata, data, count);
> -       return count;
>  }
>

What happens if buf_alloc returns NULL?

Isn't the right behavior something more along the lines of:

static int
p9_put_data(struct cbuf *bufp, const char *data, int count,
                   unsigned char **pdata)
{
        *pdata = buf_alloc(bufp, count);'
        if(*pdata)
            memmove(*pdata, data, count);
            return 0;
        else
            return ENOMEM;
}

                  -eric
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