From nobody Mon Feb 9 01:47:48 2026 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 684CEC77B7F for ; Tue, 16 May 2023 17:00:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230188AbjEPRA0 (ORCPT ); Tue, 16 May 2023 13:00:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34392 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230258AbjEPRAV (ORCPT ); Tue, 16 May 2023 13:00:21 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 0A36D8689 for ; Tue, 16 May 2023 09:59:37 -0700 (PDT) Received: from loongson.cn (unknown [10.20.42.43]) by gateway (Coremail) with SMTP id _____8CxvOp3tmNkfzcJAA--.15797S3; Wed, 17 May 2023 00:59:35 +0800 (CST) Received: from openarena.loongson.cn (unknown [10.20.42.43]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Dx87R0tmNksMhjAA--.39626S2; Wed, 17 May 2023 00:59:33 +0800 (CST) From: Sui Jingfeng To: suijingfeng <15330273260@189.cn> Cc: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH] drm/drm_vblank.c: avoid unsigned int to signed int cast Date: Wed, 17 May 2023 00:59:31 +0800 Message-Id: <20230516165931.2989639-1-suijingfeng@loongson.cn> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8Dx87R0tmNksMhjAA--.39626S2 X-CM-SenderInfo: xvxlyxpqjiv03j6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoW7tFWDAw1rtFWktw47Ww4fAFb_yoW8Ww4DpF srtryqkr4Fya40yasrCF1fAFy5Xasxt3W2yrWDu34akF1YqF13AFyFyr47WFWUX3ZFka4a yrsrXF1Fq3WUuaDanT9S1TB71UUUUjDqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bfxYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s 1l1IIY67AEw4v_Jrv_JF1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xv wVC0I7IYx2IY67AKxVWUCVW8JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwA2z4 x0Y4vEx4A2jsIE14v26r4j6F4UM28EF7xvwVC2z280aVCY1x0267AKxVW8JVW8Jr1ln4kS 14v26r126r1DM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E6xACxx 1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r126r1DMcIj6I8E87Iv 67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lc7CjxVAaw2 AFwI0_JF0_Jw1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1l4IxYO2xF xVAFwI0_JF0_Jw1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWw C2zVAF1VAY17CE14v26r1q6r43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_JFI_ Gr1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJV WUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6xkF7I0E14v26r1j6r4UYxBI daVFxhVjvjDU0xZFpf9x07j5o7tUUUUU= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Both mode->crtc_htotal and mode->crtc_vtotal are u16 type, mode->crtc_htotal * mode->crtc_vtotal will results a unsigned type. Using a u32 is enough to store the result, but considering that the result will be casted to u64 soon after. We use a u64 type directly. So there no need to cast it to signed type and cast back then. Signed-off-by: Sui Jingfeng Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Thomas Zimmermann --- drivers/gpu/drm/drm_vblank.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c index 877e2067534f..d99c404b181b 100644 --- a/drivers/gpu/drm/drm_vblank.c +++ b/drivers/gpu/drm/drm_vblank.c @@ -622,7 +622,7 @@ void drm_calc_timestamping_constants(struct drm_crtc *c= rtc, =20 /* Valid dotclock? */ if (dotclock > 0) { - int frame_size =3D mode->crtc_htotal * mode->crtc_vtotal; + u64 frame_size =3D mode->crtc_htotal * mode->crtc_vtotal; =20 /* * Convert scanline length in pixels and video @@ -630,7 +630,7 @@ void drm_calc_timestamping_constants(struct drm_crtc *c= rtc, * in nanoseconds: */ linedur_ns =3D div_u64((u64) mode->crtc_htotal * 1000000, dotclock); - framedur_ns =3D div_u64((u64) frame_size * 1000000, dotclock); + framedur_ns =3D div_u64(frame_size * 1000000, dotclock); =20 /* * Fields of interlaced scanout modes are only half a frame duration. --=20 2.25.1