From patchwork Wed May 12 14:43:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 436473 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E18DC433ED for ; Wed, 12 May 2021 16:37:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5BF1D60BBB for ; Wed, 12 May 2021 16:37:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234420AbhELQiE (ORCPT ); Wed, 12 May 2021 12:38:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:47300 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236255AbhELQ22 (ORCPT ); Wed, 12 May 2021 12:28:28 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B994561288; Wed, 12 May 2021 15:56:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620834998; bh=PzUYWI56G6/K4dFyKLi2bpIntv096eTA9x9mskYXUT8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SERFvT4uMzAg02fDP0EwPAZ2WOm3KeDe5bAH/g3IVNdU2YaqYNdAAJw3xabpk7Qbz Cj+5eDuyKQZCmxyS51Du7S2qqbflKbrESjz0YEm6duPEwpfN1QQaU3lavEx610t808 weVljZ5N+RlsLgmiMJrjB+iqLRo0+RN4C01kycAs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Erwan Le Ray , Sasha Levin Subject: [PATCH 5.12 167/677] serial: stm32: fix tx dma completion, release channel Date: Wed, 12 May 2021 16:43:33 +0200 Message-Id: <20210512144842.795044055@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Erwan Le Ray [ Upstream commit fb4f2e04ac13e7c400e6b86afbbd314a5a2a7e8d ] This patch add a proper release of dma channels when completing dma tx. Fixes: 3489187204eb ("serial: stm32: adding dma support") Signed-off-by: Erwan Le Ray Link: https://lore.kernel.org/r/20210304162308.8984-9-erwan.leray@foss.st.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/tty/serial/stm32-usart.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index a381ee52168a..74046ae3a412 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -292,6 +292,7 @@ static void stm32_usart_tx_dma_complete(void *arg) struct stm32_port *stm32port = to_stm32_port(port); const struct stm32_usart_offsets *ofs = &stm32port->info->ofs; + dmaengine_terminate_async(stm32port->tx_ch); stm32_usart_clr_bits(port, ofs->cr3, USART_CR3_DMAT); stm32port->tx_dma_busy = false;