From nobody Sun Sep 14 00:26:19 2025 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 A9BD4C05027 for ; Sun, 29 Jan 2023 18:23:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235307AbjA2SXq (ORCPT ); Sun, 29 Jan 2023 13:23:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41468 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235290AbjA2SXo (ORCPT ); Sun, 29 Jan 2023 13:23:44 -0500 Received: from smtp.smtpout.orange.fr (smtp-11.smtpout.orange.fr [80.12.242.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2319F1BAF7 for ; Sun, 29 Jan 2023 10:23:40 -0800 (PST) Received: from pop-os.home ([86.243.2.178]) by smtp.orange.fr with ESMTPA id MCKlpGwDQMaRbMCL4pnjkG; Sun, 29 Jan 2023 19:23:38 +0100 X-ME-Helo: pop-os.home X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Sun, 29 Jan 2023 19:23:38 +0100 X-ME-IP: 86.243.2.178 From: Christophe JAILLET To: gregkh@linuxfoundation.org, peterz@infradead.org, pmladek@suse.com, john.ogness@linutronix.de, baolu.lu@linux.intel.com, tglx@linutronix.de, mingo@kernel.org Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET Subject: [PATCH 3/3] usb: early: xhci-dbc: Use memcpy_and_pad() Date: Sun, 29 Jan 2023 19:23:10 +0100 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Instead of zeroing some memory and then copying data in part or all of it, use memcpy_and_pad(). This avoids writing some memory twice and should save a few cycles. Signed-off-by: Christophe JAILLET --- drivers/usb/early/xhci-dbc.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index 965a24e47c0f..341408410ed9 100644 --- a/drivers/usb/early/xhci-dbc.c +++ b/drivers/usb/early/xhci-dbc.c @@ -499,8 +499,7 @@ static int xdbc_bulk_transfer(void *data, int size, boo= l read) addr =3D xdbc.in_dma; xdbc.flags |=3D XDBC_FLAGS_IN_PROCESS; } else { - memset(xdbc.out_buf, 0, XDBC_MAX_PACKET); - memcpy(xdbc.out_buf, data, size); + memcpy_and_pad(xdbc.out_buf, XDBC_MAX_PACKET, data, size, 0); addr =3D xdbc.out_dma; xdbc.flags |=3D XDBC_FLAGS_OUT_PROCESS; } --=20 2.34.1