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 89D4F238D3A; Tue, 30 Sep 2025 14:49:34 +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=1759243774; cv=none; b=P+aeaCEUFb5wly29Rac1Xtr2B042bTSo2bJqrpaHlEB9D0JmuLW8PFI77gFIPzVk1TER9xW0Jairh56l8qg4Q9IpFiU+r8uK0lDLJU8EwbLpo+ZQQKU+eJ5aNGsppCZfSz6hyO4IvkllqZtwDJqORJaOtyCXgQHh00q6YQa7NhE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759243774; c=relaxed/simple; bh=mGIo1iVK1MX+RDtK5R70pxESSEAHwlZTL3ghZacO0Uo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=h+tgtU1vp75G81ePom/6YmRL039yUBGjxO0nsryKsuugHhVb2JwE1Q2W37g4ycSt+a4y5NN9U1OR2Qlj0/RucX+KUgT0eEoQ0EUZpMQR2yK0kdf9q083+K7k80wU1tUUJkCwiFmgilWxS6X9phVqYGT5wFYtusQqzsHrmr9YIp4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=eYqc6QnK; 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="eYqc6QnK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02294C4CEF0; Tue, 30 Sep 2025 14:49:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1759243774; bh=mGIo1iVK1MX+RDtK5R70pxESSEAHwlZTL3ghZacO0Uo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eYqc6QnK1yI2FwXATgsw6apUwij0CvlccirK3ThLbQZ4Yeo/KW/BELDQmoYlefQyb VoeT78iK+xAiLArLdtxREoGX5VjrbkVWoI8hxS6HEWgPeiIS85/+4lzOoEHX0QpxO3 QRo0h7PbRF41Wjym3CA+rBWnb5vMu8cJh8181itA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Fabian Vogt Subject: [PATCH 5.4 14/81] tty: hvc_console: Call hvc_kick in hvc_write unconditionally Date: Tue, 30 Sep 2025 16:46:16 +0200 Message-ID: <20250930143820.267002859@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250930143819.654157320@linuxfoundation.org> References: <20250930143819.654157320@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-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; }