From mboxrd@z Thu Jan 1 00:00:00 1970 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 62E33C982C1 for ; Wed, 16 Sep 2026 07:38:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5008D10E7F0; Wed, 16 Sep 2026 07:38:02 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=google.com header.i=@google.com header.b="cfm9BXl1"; dkim-atps=neutral Received: from mail-pl1-f200.google.com (mail-pl1-f200.google.com [209.85.214.200]) by gabe.freedesktop.org (Postfix) with ESMTPS id 98A8F10F34C for ; Tue, 15 Sep 2026 08:19:57 +0000 (UTC) Received: by mail-pl1-f200.google.com with SMTP id d9443c01a7336-2db87f759c5so73162925ad.1 for ; Tue, 15 Sep 2026 01:19:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1789460397; x=1790065197; darn=lists.freedesktop.org; h=content-transfer-encoding:content-type:cc:to:from:subject :message-id:references:mime-version:in-reply-to:date:from:to:cc :subject:date:message-id:reply-to:content-type; bh=GTPji740I5eKt5N5xuOCbc+sv4InPenFdSBTJb2/BeU=; b=cfm9BXl1y0SFCDKJ+zHlJ6VLoLPwQCpHehZXKYvm5R9ZhvC+2NH9pl1BoKgfVaRL4R LjDe3k8Jhfdb3ZxO8IFaqX8RXa5K5ZnLEBmRhA3L4k1d6s/f2ETT0b8PxlekpHYbpP/J hvserCgxJmo/Gjr2yTKBrHuY1Fftt6g2eQdhmvA2soFBR5PTIRRmUsLZX464MfrkJfPV UFoMCxXT6orNFNFsEFtLGUxyx2d9t81UhTmtUkMI/TC8tWzHZKVrxt6oaG9K+IVjYnQr /+5YFcvYdSqwD02Riy7hA6IOuOeGBbuInsAZ57UAaEOlvnAGMIipoGHnFKEXc7rDPv1d hY/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789460397; x=1790065197; h=content-transfer-encoding:content-type:cc:to:from:subject :message-id:references:mime-version:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=GTPji740I5eKt5N5xuOCbc+sv4InPenFdSBTJb2/BeU=; b=HexaV+9yrlTG1N1n3fclyHCxYir/U3zjWAUCmNPfzCG32KZCSMr/raQgvEw8Vt853D YW1nRfVduFUqsxElQVjoOIkC9GqfDZBdtdYZnAnkUw4VYnVb7OpXFNIoTkxMWW38177t EsgOCXooZT8q/BDw8/b1gb315nI05HxKooa5ZtyzfSELr5GCfjDWhzPE5QoUM4zzh4Pc FzXaB4+5nKBomXV3LMsEbFrAZzKh6e0PWeUgCGbVtEIXQv1RdXNpT5e6ekmmhSFAEBpn AKBeFipWXXzWiejUPD7wrG31A61z3wrwfBvQ2XxKBIcMyRj8Ly77V8kvEr+tbQDMTCCB skCQ== X-Forwarded-Encrypted: i=1; AKwUvBxuBBVDdsPDRDfR27jFjxQ+0dGgv0vRT8aZkAd8b4Eyq6qcHTZVkltssprswaoqrMDhjvfSa9J7Rjw=@lists.freedesktop.org X-Gm-Message-State: AFuF++lUGRWSeGCIBQeYYSOjQ+xSwbpGbOA+NCd7AuJYALpnKwocNvxW AFGHCo8iTcbrJX+9g6eBi/o0j/+GCFQrK5b9wpoHydkOKwU5narO4Fh4UWjiAH1u+gFuJ6d1h0n R X-Received: from pltt2.prod.google.com ([2002:a17:902:d142:b0:2dd:5303:f006]) (user=morbo job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:244d:b0:2c8:248a:5dbb with SMTP id d9443c01a7336-2dd6c5eecb7mr124092305ad.7.1789460396342; Tue, 15 Sep 2026 01:19:56 -0700 (PDT) Date: Tue, 15 Sep 2026 08:18:26 +0000 In-Reply-To: <20260915081910.4142719-1-morbo@google.com> Mime-Version: 1.0 References: <20260915081910.4142719-1-morbo@google.com> X-Mailer: git-send-email 2.55.0.1032.g73a4cd73de-goog Message-ID: <20260915081910.4142719-10-morbo@google.com> Subject: [PATCH 09/28] drm/dp_mst: Refactor build_mst_prop_path() to use seq_buf From: Bill Wendling To: linux-kernel@vger.kernel.org Cc: Bill Wendling , codemender-patching+linux@google.com, Russell King , Huacai Chen , WANG Xuerui , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Ian Abbott , H Hartley Sweeten , Tony Luck , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Matthew Brost , "=?UTF-8?q?Thomas=20Hellstr=C3=B6m?=" , Rodrigo Vivi , Dmitry Torokhov , Matthias Schwarzott , Mauro Carvalho Chehab , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Arend van Spriel , Rob Herring , Saravana Kannan , Krzysztof Kozlowski , Sylwester Nawrocki , Peter Griffin , Alim Akhtar , Linus Walleij , Anil Gurumurthy , Sudarsana Kalluru , "Martin K. Petersen" , Trond Myklebust , Anna Schumaker , Mike Marshall , Martin Brandenburg , Kees Cook , Jiri Pirko , Simon Horman , Chuck Lever , Jeff Layton , NeilBrown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Jaroslav Kysela , Takashi Iwai , Andrew Morton , "Mike Rapoport (Microsoft)" , Kanglong Wang , Tiezhu Yang , Qiang Ma , Randy Dunlap , Pengpeng Hou , Ard Biesheuvel , Breno Leitao , Thorsten Blum , Harshit Mogalapalli , Greg Kroah-Hartman , Lyude Paul , Ashutosh Desai , Imre Deak , Dmitry Baryshkov , Johan Hovold , Johannes Berg , Miri Korenblit , Alexander Stein , Cryolitia PukNgae , Jiaming Zhang , Will Porter , Cen Zhang , "=?UTF-8?q?C=C3=A1ssio=20Gabriel?=" , Rong Zhang , Arun Raghavan , linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linux-edac@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org, linux-input@vger.kernel.org, linux-media@vger.kernel.org, intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-gpio@vger.kernel.org, linux-scsi@vger.kernel.org, linux-nfs@vger.kernel.org, devel@lists.orangefs.org, linux-hardening@vger.kernel.org, linux-sound@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Wed, 16 Sep 2026 07:35:16 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" build_mst_prop_path() constructs an MST property path by formatting port numbers into a temporary buffer and appending them to "proppath" with strlcat() in a loop. In preparation for removing the deprecated strlcat() API[1], use struct seq_buf and seq_buf_printf() to format the path components directly into "proppath", eliminating the temporary buffer and repeated string scans. Link: https://github.com/KSPP/linux/issues/370 [1] Cc: codemender-patching+linux@google.com Assisted-by: Claude-3-5-Sonnet:20241022 [editor_update_file, make_kernel_bu= ild_single_file] Signed-off-by: Bill Wendling --- Cc: Russell King Cc: Huacai Chen Cc: WANG Xuerui Cc: Thomas Bogendoerfer Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.org Cc: "H. Peter Anvin" Cc: Ian Abbott Cc: H Hartley Sweeten Cc: Tony Luck Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Simona Vetter Cc: Matthew Brost Cc: "Thomas Hellstr=C3=B6m" Cc: Rodrigo Vivi Cc: Dmitry Torokhov Cc: Matthias Schwarzott Cc: Mauro Carvalho Chehab Cc: Tony Nguyen Cc: Przemek Kitszel Cc: Andrew Lunn Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: Arend van Spriel Cc: Rob Herring Cc: Saravana Kannan Cc: Krzysztof Kozlowski Cc: Sylwester Nawrocki Cc: Peter Griffin Cc: Alim Akhtar Cc: Linus Walleij Cc: Anil Gurumurthy Cc: Sudarsana Kalluru Cc: "Martin K. Petersen" Cc: Trond Myklebust Cc: Anna Schumaker Cc: Mike Marshall Cc: Martin Brandenburg Cc: Kees Cook Cc: Jiri Pirko Cc: Simon Horman Cc: Chuck Lever Cc: Jeff Layton Cc: NeilBrown Cc: Olga Kornievskaia Cc: Dai Ngo Cc: Tom Talpey Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Bill Wendling Cc: Andrew Morton Cc: "Mike Rapoport (Microsoft)" Cc: Kanglong Wang Cc: Tiezhu Yang Cc: Qiang Ma Cc: Randy Dunlap Cc: Pengpeng Hou Cc: Ard Biesheuvel Cc: Breno Leitao Cc: Thorsten Blum Cc: Harshit Mogalapalli Cc: Greg Kroah-Hartman Cc: Lyude Paul Cc: Ashutosh Desai Cc: Imre Deak Cc: Dmitry Baryshkov Cc: Johan Hovold Cc: Johannes Berg Cc: Miri Korenblit Cc: Alexander Stein Cc: Cryolitia PukNgae Cc: Jiaming Zhang Cc: Will Porter Cc: Cen Zhang Cc: "C=C3=A1ssio Gabriel" Cc: Rong Zhang Cc: Arun Raghavan Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: loongarch@lists.linux.dev Cc: linux-mips@vger.kernel.org Cc: linux-parisc@vger.kernel.org Cc: linux-edac@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org Cc: linux-input@vger.kernel.org Cc: linux-media@vger.kernel.org Cc: intel-wired-lan@lists.osuosl.org Cc: netdev@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: brcm80211@lists.linux.dev Cc: brcm80211-dev-list.pdl@broadcom.com Cc: devicetree@vger.kernel.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-gpio@vger.kernel.org Cc: linux-scsi@vger.kernel.org Cc: linux-nfs@vger.kernel.org Cc: devel@lists.orangefs.org Cc: linux-hardening@vger.kernel.org Cc: linux-sound@vger.kernel.org --- drivers/gpu/drm/display/drm_dp_mst_topology.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/dr= m/display/drm_dp_mst_topology.c index 7ce9e212770a..229b5fec44bf 100644 --- a/drivers/gpu/drm/display/drm_dp_mst_topology.c +++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c @@ -29,6 +29,7 @@ #include #include #include +#include #include =20 #if IS_ENABLED(CONFIG_DRM_DEBUG_DP_MST_TOPOLOGY_REFS) @@ -2216,19 +2217,21 @@ static void build_mst_prop_path(const struct drm_dp= _mst_branch *mstb, char *proppath, size_t proppath_size) { + struct seq_buf s; int i; - char temp[8]; =20 - snprintf(proppath, proppath_size, "mst:%d", mstb->mgr->conn_base_id); + seq_buf_init(&s, proppath, proppath_size); + + seq_buf_printf(&s, "mst:%d", mstb->mgr->conn_base_id); for (i =3D 0; i < (mstb->lct - 1); i++) { int shift =3D (i % 2) ? 0 : 4; int port_num =3D (mstb->rad[i / 2] >> shift) & 0xf; =20 - snprintf(temp, sizeof(temp), "-%d", port_num); - strlcat(proppath, temp, proppath_size); + seq_buf_printf(&s, "-%d", port_num); } - snprintf(temp, sizeof(temp), "-%d", pnum); - strlcat(proppath, temp, proppath_size); + seq_buf_printf(&s, "-%d", pnum); + + seq_buf_str(&s); } =20 /** --=20 2.55.0.1032.g73a4cd73de-goog