From patchwork Tue Mar 7 16:44:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 660400 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7548CC6FD1B for ; Tue, 7 Mar 2023 16:46:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229886AbjCGQqx (ORCPT ); Tue, 7 Mar 2023 11:46:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231187AbjCGQqe (ORCPT ); Tue, 7 Mar 2023 11:46:34 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2303F96C24; Tue, 7 Mar 2023 08:43:38 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id AFCD6614D0; Tue, 7 Mar 2023 16:43:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 18A03C433EF; Tue, 7 Mar 2023 16:43:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1678207417; bh=/wCzZzW2/yX+S5Q2Jws0Te+1469cW0yfUpj6G9fEMgw=; h=From:To:Cc:Subject:Date:From; b=fZZKakMeNyA7vBG7KIRsV5Nxp99JFYUHhpbyKacVPLYuF2c8RIhgWxmhtnrnzWEBG BXFCdiut0UjjQK/jHCw+4mnkwTH8v+OEAOEInZu056nveKGBVahgd6xDO1sUSDCoLx YgqGpOGvWVRfOVmAXovlwPc2AOMRhpojhQpcxUcTvfHrr1fFX8FUjSzA+juVQnjtxR XxT2+Grq/f5B50uIzmB4q1BxaETSbi4+iBaV2W+rirvtpvrx8YgvNQc8VPmpgAd0wo OVV451ZZl2S9W9q0CkLA5j1GiqQarrpsdGojYcA4kJB8waen/LAO2Hsgs4YGgB8swX stG8zubplE3bA== Received: from johan by xi.lan with local (Exim 4.94.2) (envelope-from ) id 1pZaQG-0003ho-4E; Tue, 07 Mar 2023 17:44:20 +0100 From: Johan Hovold To: Greg Kroah-Hartman Cc: Bjorn Andersson , Andy Gross , Konrad Dybcio , Jiri Slaby , Bartosz Golaszewski , Douglas Anderson , Daniel Thompson , linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH 0/4] serial: qcom-geni: fix console shutdown hang Date: Tue, 7 Mar 2023 17:44:01 +0100 Message-Id: <20230307164405.14218-1-johan+linaro@kernel.org> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org This series fixes some of the fallout after a recent series adding support for DMA transfers to the Qualcomm geni serial driver. Most importantly it fixes a hang during reboot when using a serial console and the getty is stopped during reboot. Doug just posted an equivalent fix here: https://lore.kernel.org/lkml/20230307073155.1.Iaab0159b8d268060a0e131ebb27125af4750ef99@changeid but the commit message only mentions the regression with respect to kgdb, which is not as widely used serial consoles generally, so I figured I'd post my version for completeness. Either version of that fix should address the immediate regression, but fixing the underlying problems which have been there since the driver was first merged is going to be a bit more involved. The rest of the series fixes a few bugs in the new DMA support that I found while investigating the console regression. Johan Johan Hovold (4): serial: qcom-geni: fix console shutdown hang serial: qcom-geni: fix DMA mapping leak on shutdown serial: qcom-geni: fix mapping of empty DMA buffer serial: qcom-geni: drop bogus uart_write_wakeup() drivers/tty/serial/qcom_geni_serial.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) Reviewed-by: Douglas Anderson Reviewed-by: Douglas Anderson Reviewed-by: Srinivas Kandagatla Tested-by: Srinivas Kandagatla Reviewed-by: Andrew Halaney Tested-by: Andrew Halaney # sa8540p-ride