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 X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 D8775C43603 for ; Tue, 17 Dec 2019 07:50:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 90ECC206D3 for ; Tue, 17 Dec 2019 07:50:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="PedRStQa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726622AbfLQHul (ORCPT ); Tue, 17 Dec 2019 02:50:41 -0500 Received: from fllv0016.ext.ti.com ([198.47.19.142]:53716 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726545AbfLQHul (ORCPT ); Tue, 17 Dec 2019 02:50:41 -0500 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id xBH7oVs8082175; Tue, 17 Dec 2019 01:50:31 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1576569031; bh=MaH2sErLpxeYmngtjI6q6hiIGh8Im8kVUfACGcBFcxM=; h=From:To:CC:Subject:Date; b=PedRStQaXUiBsqBd4AfT4VL/96DIog1txXfMnHGsrybqDCxfPSyzFld91tz8U6+DR 13N1UVnHNBYrgp8zJ/Mg9lJuefHkWDkIvWvGdGFtype1chQL2ENwJTgzLooUjFC5lg +2U/4y1ERYRNd6ikLtR7D99HljeV9y2Ib0PzjRDI= Received: from DFLE103.ent.ti.com (dfle103.ent.ti.com [10.64.6.24]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id xBH7oVOT047317 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 17 Dec 2019 01:50:31 -0600 Received: from DFLE114.ent.ti.com (10.64.6.35) by DFLE103.ent.ti.com (10.64.6.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Tue, 17 Dec 2019 01:50:30 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Tue, 17 Dec 2019 01:50:30 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id xBH7oSVU088646; Tue, 17 Dec 2019 01:50:29 -0600 From: Peter Ujfalusi To: CC: , , , , , Subject: [PATCH] iio: adc: at91: Use dma_request_chan() instead dma_request_slave_channel() Date: Tue, 17 Dec 2019 09:50:43 +0200 Message-ID: <20191217075043.23539-1-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org dma_request_slave_channel() is a wrapper on top of dma_request_chan() eating up the error code. By using dma_request_chan() directly the driver can support deferred probing against DMA. Signed-off-by: Peter Ujfalusi --- drivers/iio/adc/at91-sama5d2_adc.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index e1850f3d5cf3..a5c7771227d5 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c @@ -1444,10 +1444,10 @@ static void at91_adc_dma_init(struct platform_device *pdev) if (st->dma_st.dma_chan) return; - st->dma_st.dma_chan = dma_request_slave_channel(&pdev->dev, "rx"); - - if (!st->dma_st.dma_chan) { + st->dma_st.dma_chan = dma_request_chan(&pdev->dev, "rx"); + if (IS_ERR(st->dma_st.dma_chan)) { dev_info(&pdev->dev, "can't get DMA channel\n"); + st->dma_st.dma_chan = NULL; goto dma_exit; } -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki