From: Nathan Chancellor <nathan@kernel.org>
To: Nathan Huckleberry <nhuck@google.com>
Cc: Dan Carpenter <error27@gmail.com>,
llvm@lists.linux.dev, Philipp Zabel <p.zabel@pengutronix.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
NXP Linux Team <linux-imx@nxp.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
dri-devel@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drm/imx: imx-tve: Fix return type of imx_tve_connector_mode_valid
Date: Mon, 31 Oct 2022 14:43:42 -0700 [thread overview]
Message-ID: <Y2BBjhdk2ZIe9RGp@dev-arch.thelio-3990X> (raw)
In-Reply-To: <20220913205544.155106-1-nhuck@google.com>
On Tue, Sep 13, 2022 at 01:55:44PM -0700, Nathan Huckleberry wrote:
> The mode_valid field in drm_connector_helper_funcs is expected to be of
> type:
> enum drm_mode_status (* mode_valid) (struct drm_connector *connector,
> struct drm_display_mode *mode);
>
> The mismatched return type breaks forward edge kCFI since the underlying
> function definition does not match the function hook definition.
>
> The return type of imx_tve_connector_mode_valid should be changed from
> int to enum drm_mode_status.
>
> Reported-by: Dan Carpenter <error27@gmail.com>
> Link: https://github.com/ClangBuiltLinux/linux/issues/1703
> Cc: llvm@lists.linux.dev
> Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Can someone pick this up? It resolves a new work-in-progress clang
warning that we would like to turn on for the kernel:
drivers/gpu/drm/imx/imx-tve.c:320:16: error: incompatible function pointer types initializing 'enum drm_mode_status (*)(struct drm_connector *, struct drm_display_mode *)' with an expression of type 'int (struct drm_connector *, struct drm_display_mode *)' [-Werror,-Wincompatible-function-pointer-types-strict]
.mode_valid = imx_tve_connector_mode_valid,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
> ---
> drivers/gpu/drm/imx/imx-tve.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
> index 6b34fac3f73a..ab4d1c878fda 100644
> --- a/drivers/gpu/drm/imx/imx-tve.c
> +++ b/drivers/gpu/drm/imx/imx-tve.c
> @@ -218,8 +218,9 @@ static int imx_tve_connector_get_modes(struct drm_connector *connector)
> return ret;
> }
>
> -static int imx_tve_connector_mode_valid(struct drm_connector *connector,
> - struct drm_display_mode *mode)
> +static enum drm_mode_status
> +imx_tve_connector_mode_valid(struct drm_connector *connector,
> + struct drm_display_mode *mode)
> {
> struct imx_tve *tve = con_to_tve(connector);
> unsigned long rate;
> --
> 2.37.2.789.g6183377224-goog
>
>
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next prev parent reply other threads:[~2022-10-31 21:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-13 20:55 [PATCH] drm/imx: imx-tve: Fix return type of imx_tve_connector_mode_valid Nathan Huckleberry
2022-09-13 22:23 ` Fabio Estevam
2022-10-31 21:43 ` Nathan Chancellor [this message]
2022-11-01 13:41 ` Philipp Zabel
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