From patchwork Tue Sep 27 11:21:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Whitchurch X-Patchwork-Id: 12990463 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 1D2B6C6FA98 for ; Tue, 27 Sep 2022 11:23:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230428AbiI0LXw (ORCPT ); Tue, 27 Sep 2022 07:23:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231964AbiI0LXJ (ORCPT ); Tue, 27 Sep 2022 07:23:09 -0400 Received: from smtp2.axis.com (smtp2.axis.com [195.60.68.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A081913E7DC; Tue, 27 Sep 2022 04:21:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axis.com; q=dns/txt; s=axis-central1; t=1664277713; x=1695813713; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=r9z94nHNbG/a3bIMb6JB09Z2qRd5LB6E0MBIYBQgOAE=; b=SoT9DtW2m2H2jeVrb/N8+U+iqGJFc2f2fBMM82CxZnPClXAWHdOsz/Jk knsbru/ncOM0CGg2biKkMyJS4u0mjQMYyjVGObC34ZjzjaIsi7y3bOdJK 588WlhWJOfTKXIuyOMnxJN4wpjFitMr1xThC4fmhZ0HTe/eUYkq6pfPhE YSiDezPuaXcViOnADnOlhVbNQDR+E9tLWa4rp715u/t3tvIhK1zcI6xl4 FdvMXKk5mDJgi9WnDOw/4NNeeS3PsZFXL5qPkD+lZifVf/niv4lRvy7Ku ZyZEQUc3z2UK1VSAqmCQkUIXgGlMKTaCTmX7PD+hHgYeUbMErR010YHR2 A==; From: Vincent Whitchurch To: , , CC: , Vincent Whitchurch , , , , , Subject: [PATCH v2 1/4] spi: Save current RX and TX DMA devices Date: Tue, 27 Sep 2022 13:21:14 +0200 Message-ID: <20220927112117.77599-2-vincent.whitchurch@axis.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220927112117.77599-1-vincent.whitchurch@axis.com> References: <20220927112117.77599-1-vincent.whitchurch@axis.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org 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 ad254b94308e..dd885df23870 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) } } + ctlr->cur_rx_dma_dev = rx_dev; + ctlr->cur_tx_dma_dev = tx_dev; ctlr->cur_msg_mapped = true; return 0; @@ -1154,26 +1156,13 @@ static int __spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg) static int __spi_unmap_msg(struct spi_controller *ctlr, struct spi_message *msg) { + struct device *rx_dev = ctlr->cur_rx_dma_dev; + struct device *tx_dev = ctlr->cur_tx_dma_dev; struct spi_transfer *xfer; - struct device *tx_dev, *rx_dev; if (!ctlr->cur_msg_mapped || !ctlr->can_dma) return 0; - if (ctlr->dma_tx) - tx_dev = ctlr->dma_tx->device->dev; - else if (ctlr->dma_map_dev) - tx_dev = ctlr->dma_map_dev; - else - tx_dev = ctlr->dev.parent; - - if (ctlr->dma_rx) - rx_dev = ctlr->dma_rx->device->dev; - else if (ctlr->dma_map_dev) - rx_dev = ctlr->dma_map_dev; - else - rx_dev = 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 6ea889df0813..fbf8c0d95968 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(struct 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; /* * These hooks are for drivers that want to use the generic