From patchwork Fri Mar 15 14:03:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 13593502 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 42E9BC54E58 for ; Fri, 15 Mar 2024 14:04:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=jTp6Y4Ogs7pZZjc5sy+euPUVe8D5XdiQHSUzeoBBzT8=; b=2cC8YEhZnUkrOj QvcTPNs3/9thWFB7mAARwKSKj49nmqYYjHrP12T9I1kD5EvD7WoTpPbBI6lojTYeo3Suf4sOHy0MP 8GB6eQffuPjwieqrDTq2aoTYgS2xzxtU1fX3+QVsatWHoyjm/PJWqz0loUFWy6aUH8kzmVM5MGQWr AfI0gT4Tm1DPs+kaa+BsNK4xnFH1o51hb4cgjWN8X0iJuI5Oy83jpbGbFffowoUFv+jRTM6xn6cQa oS8VLBcfr9JOz4dx6zpXfqg+P3aPJdv1IGjExSaAN0xuN0rXKEv9/uWSc4q7waGJyKF9m3rZWp3Gf 8FZXiEXJ5Xo97Sudls/g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rl89y-00000000PmQ-0Se4; Fri, 15 Mar 2024 14:03:46 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rl89u-00000000PlJ-3uZW for linux-arm-kernel@lists.infradead.org; Fri, 15 Mar 2024 14:03:44 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1A5BEC15; Fri, 15 Mar 2024 07:04:13 -0700 (PDT) Received: from pluto.fritz.box (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4C75B3F73F; Fri, 15 Mar 2024 07:03:35 -0700 (PDT) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, Cristian Marussi Subject: [PATCH] firmware: arm_scmi: Make raw debugfs entries non-seekable Date: Fri, 15 Mar 2024 14:03:24 +0000 Message-ID: <20240315140324.231830-1-cristian.marussi@arm.com> X-Mailer: git-send-email 2.44.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240315_070343_038572_57F53E41 X-CRM114-Status: UNSURE ( 8.75 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SCMI Raw debugfs entries are used to inject and snoop messages out of the SCMI core and, as such, the underlying virtual files have no reason to support seeking. Modify the related file_operations descriptors to be non-seekable. Fixes: 3c3d818a9317 ("firmware: arm_scmi: Add core raw transmission support") Signed-off-by: Cristian Marussi --- drivers/firmware/arm_scmi/raw_mode.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/arm_scmi/raw_mode.c b/drivers/firmware/arm_scmi/raw_mode.c index 350573518503..130d13e9cd6b 100644 --- a/drivers/firmware/arm_scmi/raw_mode.c +++ b/drivers/firmware/arm_scmi/raw_mode.c @@ -921,7 +921,7 @@ static int scmi_dbg_raw_mode_open(struct inode *inode, struct file *filp) rd->raw = raw; filp->private_data = rd; - return 0; + return nonseekable_open(inode, filp); } static int scmi_dbg_raw_mode_release(struct inode *inode, struct file *filp) @@ -950,6 +950,7 @@ static const struct file_operations scmi_dbg_raw_mode_reset_fops = { .open = scmi_dbg_raw_mode_open, .release = scmi_dbg_raw_mode_release, .write = scmi_dbg_raw_mode_reset_write, + .llseek = no_llseek, .owner = THIS_MODULE, }; @@ -959,6 +960,7 @@ static const struct file_operations scmi_dbg_raw_mode_message_fops = { .read = scmi_dbg_raw_mode_message_read, .write = scmi_dbg_raw_mode_message_write, .poll = scmi_dbg_raw_mode_message_poll, + .llseek = no_llseek, .owner = THIS_MODULE, }; @@ -975,6 +977,7 @@ static const struct file_operations scmi_dbg_raw_mode_message_async_fops = { .read = scmi_dbg_raw_mode_message_read, .write = scmi_dbg_raw_mode_message_async_write, .poll = scmi_dbg_raw_mode_message_poll, + .llseek = no_llseek, .owner = THIS_MODULE, }; @@ -998,6 +1001,7 @@ static const struct file_operations scmi_dbg_raw_mode_notification_fops = { .release = scmi_dbg_raw_mode_release, .read = scmi_test_dbg_raw_mode_notif_read, .poll = scmi_test_dbg_raw_mode_notif_poll, + .llseek = no_llseek, .owner = THIS_MODULE, }; @@ -1021,6 +1025,7 @@ static const struct file_operations scmi_dbg_raw_mode_errors_fops = { .release = scmi_dbg_raw_mode_release, .read = scmi_test_dbg_raw_mode_errors_read, .poll = scmi_test_dbg_raw_mode_errors_poll, + .llseek = no_llseek, .owner = THIS_MODULE, };