From patchwork Tue Sep 13 20:54:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nathan Huckleberry X-Patchwork-Id: 12975363 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5C489ECAAD8 for ; Tue, 13 Sep 2022 20:55:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229480AbiIMUzV (ORCPT ); Tue, 13 Sep 2022 16:55:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229456AbiIMUzS (ORCPT ); Tue, 13 Sep 2022 16:55:18 -0400 Received: from mail-ua1-x94a.google.com (mail-ua1-x94a.google.com [IPv6:2607:f8b0:4864:20::94a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D3351E3C5 for ; Tue, 13 Sep 2022 13:55:16 -0700 (PDT) Received: by mail-ua1-x94a.google.com with SMTP id z8-20020ab05648000000b003b48415d88cso3862978uaa.10 for ; Tue, 13 Sep 2022 13:55:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:from:subject:message-id:mime-version:date:from:to:cc:subject :date; bh=nJJJEPzYfSkXVdsCpO+dC++9rjlYO0nwzxMLu7tGL28=; b=kBuaNyAa7BFLRUEAj+HWAu4RAwHGJ9M57W9cIKk5MyobRXZOJfVdASqgAzWehpzyUn Y2IjOvlKDeODQuKbuNU3iikjsk79MNdjB7129WV6VfDSJNyYNNWrbljfwjvUPNHaboNr uiD84mx7PdI1dLViLrk1nug6KFyvMaOYA5/g2iznrnDGS9JbMdD4SWf2Db7rcUZGQLcG PMriKa3MzKAq1ZqqRh77D4TnN4zbttl85a6WpoJim5+T9nS0Gpmnk8hOc6Hgjloq/vak YyqkjUk+2SaZYQyLFnw2OgHqRIPyCfeeMNJtGxqxurWYcYuRL5J4RQfQpyzJPmHPv9zm QTyQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date; bh=nJJJEPzYfSkXVdsCpO+dC++9rjlYO0nwzxMLu7tGL28=; b=STZ/H0+/Q9h422j0UBlOc2zFSl/XtmaNxMNXsoqj2WdJMyv+LmxB5Vn07DToHMcpzg fLdbsy44gJ9EbQsHWVmmyG2YdhOlUlKBO0Q+fKr5jaleM90T6KNph2vbr6R84BtWh83X vIK6O2cEtvJGYvstPCiUEVv7hggTNkJLI2Jg9RAJ6QPP3Mpj2swVl1cI+0amgYWwOoLa MMlZxJwM+nYhwW9Gs6kDnLuBHllGamKYEg1BpE1T2D0AFPWnhfDXpQkSvoJ9SNwYOgjP OFZfWpHVR1bOD5se7crOkrj+q4NHJVsLiX2DqGcKaYEPT2RmFacAlU2Ky1+fNh/cErdf JcDw== X-Gm-Message-State: ACgBeo3fVFzGnK73NROVDdXBbnHm+iCzNOkGRqZn9Nc+mzWno9cbIn/v vKRVdwZh3UWSSEGZcZBvLfK/I8CZLw== X-Google-Smtp-Source: AA6agR4lN1+7GX3YCJf/g+HqBAOkYjtAZV+sr5K0G3Nx6PLg9iKXtY/f1H3UDT4F3TWgC7ydjoSAksoqag== X-Received: from nhuck.c.googlers.com ([fda3:e722:ac3:cc00:14:4d90:c0a8:39cc]) (user=nhuck job=sendgmr) by 2002:a05:6122:106e:b0:39e:e580:440 with SMTP id k14-20020a056122106e00b0039ee5800440mr10035328vko.37.1663102515183; Tue, 13 Sep 2022 13:55:15 -0700 (PDT) Date: Tue, 13 Sep 2022 13:54:49 -0700 Mime-Version: 1.0 X-Mailer: git-send-email 2.37.2.789.g6183377224-goog Message-ID: <20220913205449.154966-1-nhuck@google.com> Subject: [PATCH] drm/exynos: Fix return type for mixer_mode_valid and hdmi_mode_valid From: Nathan Huckleberry Cc: Nathan Huckleberry , Dan Carpenter , llvm@lists.linux.dev, Inki Dae , Seung-Woo Kim , Kyungmin Park , David Airlie , Daniel Vetter , Krzysztof Kozlowski , Alim Akhtar , Nathan Chancellor , Nick Desaulniers , Tom Rix , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org The field mode_valid in exynos_drm_crtc_ops is expected to be of type enum drm_mode_status (*mode_valid)(struct exynos_drm_crtc *crtc, const struct drm_display_mode *mode); Likewise for mode_valid in drm_connector_helper_funcs. The mismatched return type breaks forward edge kCFI since the underlying function definition does not match the function hook definition. The return type of mixer_mode_valid and hdmi_mode_valid should be changed from int to enum drm_mode_status. Reported-by: Dan Carpenter Link: https://github.com/ClangBuiltLinux/linux/issues/1703 Cc: llvm@lists.linux.dev Signed-off-by: Nathan Huckleberry Reviewed-by: Nathan Chancellor --- drivers/gpu/drm/exynos/exynos_hdmi.c | 4 ++-- drivers/gpu/drm/exynos/exynos_mixer.c | 5 +++-- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index 10b0036f8a2e..8453359c92e8 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -922,8 +922,8 @@ static int hdmi_find_phy_conf(struct hdmi_context *hdata, u32 pixel_clock) return -EINVAL; } -static int hdmi_mode_valid(struct drm_connector *connector, - struct drm_display_mode *mode) +static enum drm_mode_status hdmi_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) { struct hdmi_context *hdata = connector_to_hdmi(connector); int ret; diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 65260a658684..82f676e6d21b 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -1045,8 +1045,9 @@ static void mixer_atomic_disable(struct exynos_drm_crtc *crtc) clear_bit(MXR_BIT_POWERED, &ctx->flags); } -static int mixer_mode_valid(struct exynos_drm_crtc *crtc, - const struct drm_display_mode *mode) +static enum drm_mode_status +mixer_mode_valid(struct exynos_drm_crtc *crtc, + const struct drm_display_mode *mode) { struct mixer_context *ctx = crtc->ctx; u32 w = mode->hdisplay, h = mode->vdisplay;