From patchwork Mon Dec 16 11:34:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 13909594 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 877D7E7717F for ; Mon, 16 Dec 2024 11:34:53 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E783610E5BE; Mon, 16 Dec 2024 11:34:52 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=weissschuh.net header.i=@weissschuh.net header.b="N5W6GuU5"; dkim-atps=neutral Received: from todd.t-8ch.de (todd.t-8ch.de [IPv6:2a01:4f8:c010:41de::1]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3F54810E5AD for ; Mon, 16 Dec 2024 11:34:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1734348890; bh=1qtbMa2oIpffo9qrfeElmnz139mrppvwu3zsjT10qrM=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=N5W6GuU506HNT67hwXsBzcHmTOnA3z9T530lNzo6ZAFFjhK4OuxHW/hT28vPUXRUe HxFFqadWxwc4SPCpP6eFLmSoFTcMlA8bB15EBXUpbmR7cdcRtfIUouR+vVKt9Uw2e0 Rea2lK1bB6x6zC30dJQ1M2KZpt3Bi2wn3c2giG7g= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Date: Mon, 16 Dec 2024 12:34:48 +0100 Subject: [PATCH 2/5] drm/lima: Constify 'struct bin_attribute' MIME-Version: 1.0 Message-Id: <20241216-sysfs-const-bin_attr-drm-v1-2-210f2b36b9bf@weissschuh.net> References: <20241216-sysfs-const-bin_attr-drm-v1-0-210f2b36b9bf@weissschuh.net> In-Reply-To: <20241216-sysfs-const-bin_attr-drm-v1-0-210f2b36b9bf@weissschuh.net> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Qiang Yu , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , Xinhui Pan , Harry Wentland , Leo Li , Rodrigo Siqueira Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, lima@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1734348889; l=1710; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=1qtbMa2oIpffo9qrfeElmnz139mrppvwu3zsjT10qrM=; b=1WNI1ZkIE8rqLbERLmmdHNShe5o5cZbun/mqENhN73fwlitBkkCVqnSWtvKibM9ZtYm50iZQz jn1nSK2Tek2Du1yWr9Wxx1x0jCnSs6GepiyTnnI7BHf93+3qRL9WWgz X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= 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" The sysfs core now allows instances of 'struct bin_attribute' to be moved into read-only memory. Make use of that to protect them against accidental or malicious modifications. Signed-off-by: Thomas Weißschuh --- drivers/gpu/drm/lima/lima_drv.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/lima/lima_drv.c b/drivers/gpu/drm/lima/lima_drv.c index fb3062c872b317ef27cd321b2638944f8a5dc33a..b969bd3f28968304946c0bb629460e91622d5fbc 100644 --- a/drivers/gpu/drm/lima/lima_drv.c +++ b/drivers/gpu/drm/lima/lima_drv.c @@ -311,7 +311,7 @@ static bool lima_read_block(struct lima_block_reader *reader, } static ssize_t lima_error_state_read(struct file *filp, struct kobject *kobj, - struct bin_attribute *attr, char *buf, + const struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct device *dev = kobj_to_dev(kobj); @@ -337,7 +337,7 @@ static ssize_t lima_error_state_read(struct file *filp, struct kobject *kobj, } static ssize_t lima_error_state_write(struct file *file, struct kobject *kobj, - struct bin_attribute *attr, char *buf, + const struct bin_attribute *attr, char *buf, loff_t off, size_t count) { struct device *dev = kobj_to_dev(kobj); @@ -363,8 +363,8 @@ static const struct bin_attribute lima_error_state_attr = { .attr.name = "error", .attr.mode = 0600, .size = 0, - .read = lima_error_state_read, - .write = lima_error_state_write, + .read_new = lima_error_state_read, + .write_new = lima_error_state_write, }; static int lima_pdev_probe(struct platform_device *pdev)