From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 898F960700F1 for ; Wed, 4 Nov 2026 17:31:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=uHJRzMjd; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=iXWQB5YV DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; 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Wed, 4 Nov 2026 17:30:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793813469; bh=88D9snc5Fvfzc1+bIGylCXCzBagXIGxBtzK0BL7vNTc=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=iXWQB5YV7Kg3RUIa93AFETN1SWavnlv7A2+KZO2N+8yOFr8Nxzd0awnAdzvrIJxvb iwsd7/OXYpIIPoZK/zUDKbVBITgvtCbvRQFx8uTJc/yHlxoEsUDPjmLWXFVoYRwB+8 bO30Hh/TGyjWLlo74Zlkba+soU5l3Xz8vC5ijD1rLCYQM6eOaon/FPI6bnSWWK8jej tu9UAUvRhODWIvMSMgtdBEbC7EPtC8P3EjAe6KdJiEatnSukLFtVejwpJye5oyaiRy wq31IKuon20SWlj10PyNweaP+Lu1uhJgSBnAqLcp9bykPHQNRISX1eYd4dr2KLd0HB SFAF9fcqUvWgQ== From: Christian Brauner Date: Wed, 04 Nov 2026 18:27:28 +0100 Subject: [PATCH v2 11/51] sparc: led: consume the whole write X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261104-work-procfs-bugfixes-v2-11-bbf7d5546809@kernel.org> References: <20261104-work-procfs-bugfixes-v2-0-bbf7d5546809@kernel.org> In-Reply-To: <20261104-work-procfs-bugfixes-v2-0-bbf7d5546809@kernel.org> To: linux-fsdevel@vger.kernel.org Cc: Linus Torvalds , Jann Horn , Josef Bacik , Chris Mason , Jeff Layton , NeilBrown , Eric Dumazet , Thomas Gleixner , Al Viro , Jonathan Corbet , Christoph Hellwig , Greg Kroah-Hartman , Joel Granados , Kees Cook , Jan Kara , Jan Kara , linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-um@lists.infradead.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, platform-driver-x86@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-sound@vger.kernel.org, netfilter-devel@vger.kernel.org, dri-devel@lists.freedesktop.org, ibm-acpi-devel@lists.sourceforge.net, jfs-discussion@lists.sourceforge.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-cifs@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, sparclinux@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-atm-general@lists.sourceforge.net, Takashi Iwai , linux-input@vger.kernel.org, linux-raid@vger.kernel.org, linux-ext4@vger.kernel.org, linux-modules@vger.kernel.org, linux-debuggers@vger.kernel.org, "Christian Brauner (Amutable)" , Chuck Lever X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=1161; i=brauner@kernel.org; h=from:subject:message-id; bh=5p0zMz40BbKdivFQo1NNbyIz4tkvEi3yC5tXL4aXaeU=; b=owGbwMvMwCU28Zj0gdSKO4sYT6slMWS9zmaz+l255/dcMbeVTrFanCknSsvkc1YVB3m43Lw5N drx0iaxjlIWBjEuBlkxRRaHdpNwueU8FZuNMjVg5rAygQxh4OIUgIkI32BkeHvU6KWe6gWDSokM AXPh+UdezXsoZMqyb+L5Puufyec6zBkZ1nYtn1J1+eNm5X8arkoP+O5vXXg4NDqzfr7dM//7HjX /+QA= X-Developer-Key: i=brauner@kernel.org; a=openpgp; fpr=4880B8C9BD0E5106FC070F4F7B3C391EFEA93624 X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 led_proc_write() looks at the first eight bytes of a write and returns that many, so a writer that loops until everything is written, stdio does, sends the rest as a second command. That one is unknown and switches the LED off. Return the whole count, the rest is ignored. Fixes: ee1858d3122d ("[SPARC]: Add sun4m LED driver.") Signed-off-by: Christian Brauner (Amutable) --- arch/sparc/kernel/led.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/sparc/kernel/led.c b/arch/sparc/kernel/led.c index 9b53ac1fe533..a1478de9fe5d 100644 --- a/arch/sparc/kernel/led.c +++ b/arch/sparc/kernel/led.c @@ -68,6 +68,7 @@ static int led_proc_open(struct inode *inode, struct file *file) static ssize_t led_proc_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { + size_t len = count; char *buf = NULL; if (count > LED_MAX_LENGTH) @@ -102,7 +103,7 @@ static ssize_t led_proc_write(struct file *file, const char __user *buffer, kfree(buf); - return count; + return len; } static const struct proc_ops led_proc_ops = { -- 2.53.0