From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from www.zeus03.de ([194.117.254.33]:49902 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1032746AbeBONMk (ORCPT ); Thu, 15 Feb 2018 08:12:40 -0500 Date: Thu, 15 Feb 2018 14:12:37 +0100 From: Wolfram Sang To: Ulrich Hecht Cc: linux-renesas-soc@vger.kernel.org, linux-serial@vger.kernel.org, geert@linux-m68k.org, yoshihiro.shimoda.uh@renesas.com Subject: Re: [PATCH] serial: sh-sci: prevent lockup on full TTY buffers Message-ID: <20180215131237.4yi42wq4duic7uaq@katana> References: <1518696147-23790-1-git-send-email-ulrich.hecht+renesas@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="2yddoec54ffcayat" Content-Disposition: inline In-Reply-To: <1518696147-23790-1-git-send-email-ulrich.hecht+renesas@gmail.com> Sender: linux-renesas-soc-owner@vger.kernel.org List-ID: --2yddoec54ffcayat Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > This can be prevented by doing a dummy read of the RX data register. Just so I understand the issue correctly: We are reading the register to throw the content away to prevent it being used in the TTY buffers? --2yddoec54ffcayat Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAlqFh0QACgkQFA3kzBSg KbbKBQ/9FxFI+YMHsIhQbAo2Iqn0Yt+GMl4husICOOQwMRzRTSVaQmkAIZZLNHo1 2A6Gk3HwBSNAZbOQ7GWqjJnkB9/3xbpealYhTeSjlQTZb4O5r3MhAN7KECHeO7Pi tzy3TPBnc/qOkVfDIvyi7Y0godRuV+93KMPpH9khvCZ6BYtXOFoafSpTkxOL00zC W7uwFfQnOqCoekAq/L3ZwyR57wA+LbMD963dIhtWSPoDhHJ5x1646vOuDWwb+vqF eRSrQEUYI/vJgsdKeaqVMeyaKWWg1E3cUmkm1Tx+BF0eYAjv9h/OKP5XN+xq8Jvq 9Xo4ODeSHvjRkItoz+/ovVNRhVSdQMccc0hX6vxrJBf11Hy70I5sS8xQxuZ5LeLU s1C94aALp71D/XSRrq1gIc4lxJ/aQan3dM/G6Q3ldg85k772d4GMXBQc8vqwPXwe qTQ1W1BC3QlGOp9LZ4REBvEOtosU8vuT2IuFBg3TzB1+/8MHbdpqoddLcQaITXmm Vy815MPUCLZQiYDt0r76eSDM4b0ryp73RUowHSdC0pVmtpC14PVJSZKmaSfQb8pY l76e0dp9WKVpE8CN7ayVPx54yveLjMNHwa0VVpVFZHu3iRglzwaCN0KH5PRcdlgp r8ZSv2p8kY5F2HODInz3s+57N96yUdnVms4qTV2VmLNywf9QpWw= =Cv23 -----END PGP SIGNATURE----- --2yddoec54ffcayat--