From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: "Dr. David Alan Gilbert" <dave@treblig.org>,
matthew.brost@intel.com, mgreer@animalcreek.com
Cc: linux-kernel@vger.kernel.org, airlied@gmail.com,
intel-gfx@lists.freedesktop.org
Subject: Re: ERR_PTR(0) in a couple of places
Date: Sun, 24 Sep 2023 13:41:23 +0200 [thread overview]
Message-ID: <b3813a4e-3956-254c-a7cf-0fca65dc2cdd@linaro.org> (raw)
In-Reply-To: <ZQ+Fo9WKyGphwI8R@gallifrey>
On 24/09/2023 02:41, Dr. David Alan Gilbert wrote:
> Hi,
> I randomly noticed there are a couple of places in the kernel that
> do
> ERR_PTR(0);
>
> and thought that was odd - shouldn't those just be NULL's ?
>
> 1) i915
> drivers/gpu/drm/i915/gt/uc/selftest_guc_multi_lrc.c : 47
>
> if (i <= 1)
> return ERR_PTR(0);
>
> from f9d72092cb490
>
> 2) trf7970a
> drivers/nfc/trf7970a.c : 896
>
> trf->ignore_timeout =
> !cancel_delayed_work(&trf->timeout_work);
> trf->rx_skb = ERR_PTR(0);
I would guess that code is relying on rx_skb being valid pointer or ERR
(if (!IS_ERR(...))).
Best regards,
Krzysztof
next prev parent reply other threads:[~2023-09-24 11:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-24 0:41 Dr. David Alan Gilbert
2023-09-24 11:41 ` Krzysztof Kozlowski [this message]
2023-09-24 12:16 ` Dr. David Alan Gilbert
2023-09-25 4:18 ` Matthew Brost
2023-09-25 4:25 ` Randy Dunlap
2023-09-25 15:09 ` [Intel-gfx] " Jani Nikula
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