From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2A4FF1EE02F; Tue, 30 Sep 2025 15:09:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759244996; cv=none; b=VwuDNGy7CzEaUkeqO86fEsktpWORhYomkaeg9Hp1eIY5/QpByf9n1/XBm0+8v5ti04qqrKhwUvYjNiheFxnfNUz7Ucn7wJh4z8mUlCCvRbSKLA7MwjkVwD+W/MsnITZ64dMf2oAcw8V+lyyCL2zP+Am1hyELM+tjNB0xk6ty6QQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759244996; c=relaxed/simple; bh=RWdZOC1K+PE4f4ccrUbHW9pb/7/2Dfhy6uQV1uBzCs0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SDNfjWBuTCmi0K0oqV6ewnY8yLsX9mZGfjZciSbywIWbWUX0sB/ZozZ528Dva0V3SLjfmSvcUFBbiFHTppWHB/awKDZGLKJhh2fFLyPK/46yMJ/C8ic+u340YH7VrLH0DZ3kULqY9X5+fAiaZZ7nLD3GZRt24BanyfceE3JzGsc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pO7zmX5m; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="pO7zmX5m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 323E8C113D0; Tue, 30 Sep 2025 15:09:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1759244995; bh=RWdZOC1K+PE4f4ccrUbHW9pb/7/2Dfhy6uQV1uBzCs0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pO7zmX5miisczczDNFpU4qRUePpe5jjNcXWjOmfNB4oEljZBk0RXpJqZ8TTUXLKn0 g9+yyqSfi9QyjN6wQoilSz+ZUBNULSOKVcW77Opoy24IJx2HchaTkD3yzf8o2QsJYv tn0TURp0LtgK4roqN8BJi67TqisLWIEcDkHr1OCE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Fabian Vogt Subject: [PATCH 5.15 034/151] tty: hvc_console: Call hvc_kick in hvc_write unconditionally Date: Tue, 30 Sep 2025 16:46:04 +0200 Message-ID: <20250930143828.973862341@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250930143827.587035735@linuxfoundation.org> References: <20250930143827.587035735@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Fabian Vogt commit cfd956dcb101aa3d25bac321fae923323a47c607 upstream. After hvc_write completes, call hvc_kick also in the case the output buffer has been drained, to ensure tty_wakeup gets called. This fixes that functions which wait for a drained buffer got stuck occasionally. Cc: stable Closes: https://bugzilla.opensuse.org/show_bug.cgi?id=1230062 Signed-off-by: Fabian Vogt Link: https://lore.kernel.org/r/2011735.PYKUYFuaPT@fvogt-thinkpad Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvc_console.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -543,10 +543,10 @@ static int hvc_write(struct tty_struct * } /* - * Racy, but harmless, kick thread if there is still pending data. + * Kick thread to flush if there's still pending data + * or to wakeup the write queue. */ - if (hp->n_outbuf) - hvc_kick(); + hvc_kick(); return written; }