From nobody Fri Apr 3 05:33:46 2026 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 8F911C54EE9 for ; Fri, 16 Sep 2022 11:40:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231190AbiIPLkA (ORCPT ); Fri, 16 Sep 2022 07:40:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46840 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229532AbiIPLj5 (ORCPT ); Fri, 16 Sep 2022 07:39:57 -0400 Received: from smtp1.axis.com (smtp1.axis.com [195.60.68.17]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E39A227CC0; Fri, 16 Sep 2022 04:39:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axis.com; q=dns/txt; s=axis-central1; t=1663328396; x=1694864396; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=5gyRJMshptIEnXvFy/S2sxnAHY4n+uAltIvtK8WJPTI=; b=T0EL9QrklCuUoZu8crHKzLsYGXNRZ9dBdYQ/h+7zDD29OAbgLMLYVT3m EP9//+DH5WmQYF83/+vS8DNCbv8QgKyK8AY4EbvWPY/B2+hUFf+k/EDP+ 3ylxeSKpxKQIIYB4Yacm6jDDQL1PUoT4L4TO7i4S4lfwmAFdEU1uSeIKJ pw8Q0u6lFWabYkZRHCLWynHdoKA13ze98IpHg867yna+5iDQVablERiRI D5xk67b0VHK5zpL1JevgcQSPzqTG0g1HTko5FSGbK5PmeArYIl6yvXAkL h7/SgfAIissQKivjP3NFp1vXWy6q+2MkoslaWFEmagb9ohEiGixBSIUv/ w==; From: Vincent Whitchurch To: , , CC: , Vincent Whitchurch , , , , , Subject: [PATCH 2/4] spi: Save current RX and TX DMA devices Date: Fri, 16 Sep 2022 13:39:49 +0200 Message-ID: <20220916113951.228398-3-vincent.whitchurch@axis.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220916113951.228398-1-vincent.whitchurch@axis.com> References: <20220916113951.228398-1-vincent.whitchurch@axis.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Save the current RX and TX DMA devices to avoid having to duplicate the logic to pick them, since we'll need access to them in some more functions to fix a bug in the cache handling. Signed-off-by: Vincent Whitchurch --- drivers/spi/spi.c | 19 ++++--------------- include/linux/spi/spi.h | 4 ++++ 2 files changed, 8 insertions(+), 15 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 32c01e684af3..a9134d062ff1 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1147,6 +1147,8 @@ static int __spi_map_msg(struct spi_controller *ctlr,= struct spi_message *msg) } } =20 + ctlr->cur_rx_dma_dev =3D rx_dev; + ctlr->cur_tx_dma_dev =3D tx_dev; ctlr->cur_msg_mapped =3D true; =20 return 0; @@ -1154,26 +1156,13 @@ static int __spi_map_msg(struct spi_controller *ctl= r, struct spi_message *msg) =20 static int __spi_unmap_msg(struct spi_controller *ctlr, struct spi_message= *msg) { + struct device *rx_dev =3D ctlr->cur_rx_dma_dev; + struct device *tx_dev =3D ctlr->cur_tx_dma_dev; struct spi_transfer *xfer; - struct device *tx_dev, *rx_dev; =20 if (!ctlr->cur_msg_mapped || !ctlr->can_dma) return 0; =20 - if (ctlr->dma_tx) - tx_dev =3D ctlr->dma_tx->device->dev; - else if (ctlr->dma_map_dev) - tx_dev =3D ctlr->dma_map_dev; - else - tx_dev =3D ctlr->dev.parent; - - if (ctlr->dma_rx) - rx_dev =3D ctlr->dma_rx->device->dev; - else if (ctlr->dma_map_dev) - rx_dev =3D ctlr->dma_map_dev; - else - rx_dev =3D ctlr->dev.parent; - list_for_each_entry(xfer, &msg->transfers, transfer_list) { if (!ctlr->can_dma(ctlr, msg->spi, xfer)) continue; diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index f089ee1ead58..7466a171d7e5 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -378,6 +378,8 @@ extern struct spi_device *spi_new_ancillary_device(stru= ct spi_device *spi, u8 ch * @cleanup: frees controller-specific state * @can_dma: determine whether this controller supports DMA * @dma_map_dev: device which can be used for DMA mapping + * @cur_rx_dma_dev: device which is currently used for RX DMA mapping + * @cur_tx_dma_dev: device which is currently used for TX DMA mapping * @queued: whether this controller is providing an internal message queue * @kworker: pointer to thread struct for message pump * @pump_messages: work struct for scheduling work to the message pump @@ -610,6 +612,8 @@ struct spi_controller { struct spi_device *spi, struct spi_transfer *xfer); struct device *dma_map_dev; + struct device *cur_rx_dma_dev; + struct device *cur_tx_dma_dev; =20 /* * These hooks are for drivers that want to use the generic --=20 2.34.1