Re: [PATCH 1/1] atmel-ssc: fix misuse of dev_dbg when requested sscinstance is not found

From: Andrew Morton
Date: Thu Jan 29 2009 - 18:51:43 EST


On Thu, 29 Jan 2009 17:46:55 +0100
Hans-Christian Egtvedt <hans-christian.egtvedt@xxxxxxxxx> wrote:

> On Mon, 19 Jan 2009 13:57:56 +0100
> Hans-Christian Egtvedt <hans-christian.egtvedt@xxxxxxxxx> wrote:
> > This patch replaces the dev_dbg(...) with a pr_err since the ssc
> > pointer is not valid when the id is not found in the list.
> >
> > Signed-off-by: Hans-Christian Egtvedt
> > <hans-christian.egtvedt@xxxxxxxxx> ---
> > drivers/misc/atmel-ssc.c | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
> > index 6b35874..6cff1bb 100644
> > --- a/drivers/misc/atmel-ssc.c
> > +++ b/drivers/misc/atmel-ssc.c
> > @@ -35,7 +35,7 @@ struct ssc_device *ssc_request(unsigned int ssc_num)
> >
> > if (!ssc_valid) {
> > spin_unlock(&user_lock);
> > - dev_dbg(&ssc->pdev->dev, "could not find requested device\n");
> > + pr_err("ssc: ssc%d platform device is missing\n", ssc_num);
> > return ERR_PTR(-ENODEV);
> > }
> >
>
> Bump, or did I miss the merge window?
>

(Top-posting repaired. Please don't do that! It makes it horrid to
reply to you)

(Suitable cc's added - this was why your patch got lost)

The patch seems reasonable but the changelog seems to be quite
misleading. I did this:

The ssc pointer is not valid when the id is not found in the
list. Convert the message from a debug one into an error message
and avoid dereferencing the bad pointer.

OK?
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