From mboxrd@z Thu Jan 1 00:00:00 1970 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 1D0B0C433EF for ; Tue, 19 Jul 2022 12:02:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238033AbiGSMCl (ORCPT ); Tue, 19 Jul 2022 08:02:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237782AbiGSMCD (ORCPT ); Tue, 19 Jul 2022 08:02:03 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9DE543E4E; Tue, 19 Jul 2022 04:58:55 -0700 (PDT) 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 ams.source.kernel.org (Postfix) with ESMTPS id 79CBFB81A8F; Tue, 19 Jul 2022 11:58:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B3344C341CA; Tue, 19 Jul 2022 11:58:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1658231933; bh=pneqByNjx/sGoWroweySELz1T991Ow00L40BUVLYOUY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g9DM7mDLl1cSUgNVgQMgo+od79KLuQfVdjNzgLmyH6pljingi5u3sYYRgtDZyXTWs KzYpP1n3pdEirjhgLIu68vwp7Za9pyWha/NQH+jVdJE9VGuWCwvh6SPwE85XNxMGa/ iwu123Tj1ohxrqn2h8iBXWXXkxCud2zLoICA2xG8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, stable , Marek Szyprowski , Krzysztof Kozlowski , Chanho Park Subject: [PATCH 4.14 40/43] tty: serial: samsung_tty: set dma burst_size to 1 Date: Tue, 19 Jul 2022 13:54:11 +0200 Message-Id: <20220719114525.359838402@linuxfoundation.org> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20220719114521.868169025@linuxfoundation.org> References: <20220719114521.868169025@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chanho Park commit f7e35e4bf1e8dc2c8cbd5e0955dc1bd58558dae0 upstream. The src_maxburst and dst_maxburst have been changed to 1 but the settings of the UCON register aren't changed yet. They should be changed as well according to the dmaengine slave config. Fixes: aa2f80e752c7 ("serial: samsung: fix maxburst parameter for DMA transactions") Cc: stable Cc: Marek Szyprowski Reviewed-by: Krzysztof Kozlowski Signed-off-by: Chanho Park Link: https://lore.kernel.org/r/20220627065113.139520-1-chanho61.park@samsung.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -241,8 +241,7 @@ static void enable_tx_dma(struct s3c24xx /* Enable tx dma mode */ ucon = rd_regl(port, S3C2410_UCON); ucon &= ~(S3C64XX_UCON_TXBURST_MASK | S3C64XX_UCON_TXMODE_MASK); - ucon |= (dma_get_cache_alignment() >= 16) ? - S3C64XX_UCON_TXBURST_16 : S3C64XX_UCON_TXBURST_1; + ucon |= S3C64XX_UCON_TXBURST_1; ucon |= S3C64XX_UCON_TXMODE_DMA; wr_regl(port, S3C2410_UCON, ucon); @@ -515,7 +514,7 @@ static void enable_rx_dma(struct s3c24xx S3C64XX_UCON_DMASUS_EN | S3C64XX_UCON_TIMEOUT_EN | S3C64XX_UCON_RXMODE_MASK); - ucon |= S3C64XX_UCON_RXBURST_16 | + ucon |= S3C64XX_UCON_RXBURST_1 | 0xf << S3C64XX_UCON_TIMEOUT_SHIFT | S3C64XX_UCON_EMPTYINT_EN | S3C64XX_UCON_TIMEOUT_EN |