From patchwork Tue Dec 17 07:37:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Ujfalusi X-Patchwork-Id: 181836 Delivered-To: patch@linaro.org Received: by 2002:a92:3001:0:0:0:0:0 with SMTP id x1csp5399480ile; Mon, 16 Dec 2019 23:37:48 -0800 (PST) X-Google-Smtp-Source: APXvYqxDee1sHWC5RZBN3VAni0lMGbsqlWwt9Z/1njbFhDEx6mh4DRVd58/Q3ZUHL/NP8DYlKs3S X-Received: by 2002:a9d:588d:: with SMTP id x13mr34624812otg.6.1576568268570; Mon, 16 Dec 2019 23:37:48 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1576568268; cv=none; d=google.com; s=arc-20160816; b=xYJRfIbgbsV5901cijnF6mdkN7CmpXR2AsWbmuhA46Zo1q0NzUVis2Nlpi5tXX6v0g 39SyWvZHpiWksXBdvYsGnrhzgr7Z4TzGDm2uP01zcR4dPuffuLTnVS+2PAK/F9cTPiq1 SkNJQHPlCi/aCcqQ2WCy0W2tPT/+UaHMakhElBxR+9UhKEUd22hKwC/zaIqajPPrjnc/ MZxvlI0Mkq2QCN2qNQimz2uYuKd50sRh6DazEcMyxF8u+bxelSw4kSCMcLgskpKQIXqR NyX/Ru2uJXZE0DV1crKE01uF0tAVJ/VFmLFJmQJvZ8yBM0qZgfFmLUR8spnGbMgRzqpn sijA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :message-id:date:subject:cc:to:from:dkim-signature; bh=uq4M6dCHylxyKFwJawgtPdUJOCVELJz3UBxlL6ZzTc4=; b=o+H3Pc81i0IWxYDF9ntRlQJPmTp2vVl666/uheaE5w6/P8BYhVbCJ9yA3Fe51If9RD Kaf2n4x+/K+KlyfaCKrw2pd7K5g0exFgDhECNz9wGOIuYNSh8F02UmySx4ovPTG2RX33 4V87mwqjv+v3xYH2rHy8W6ZE26iKryoQbGo0eylZaOr6lQPQKPP6+dbjpxuGCjLz1cWT HjxC3gppgPAKINNa7efhGVempsWJbXUJm1H0W/zaSSnTRpKP3CnZo+ltSCjnJfZNDc7v pJuZRAMSowBa7Nzkmd7tSMynn5QvG0zVHSZntGdpbKmUSe7CoEer86JOje6BicrTW4Rb M0cw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=aXtLu1vI; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id h4si11487198otk.172.2019.12.16.23.37.48; Mon, 16 Dec 2019 23:37:48 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=aXtLu1vI; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728112AbfLQHhq (ORCPT + 27 others); Tue, 17 Dec 2019 02:37:46 -0500 Received: from lelv0142.ext.ti.com ([198.47.23.249]:53866 "EHLO lelv0142.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726167AbfLQHhq (ORCPT ); Tue, 17 Dec 2019 02:37:46 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0142.ext.ti.com (8.15.2/8.15.2) with ESMTP id xBH7bHKH006897; Tue, 17 Dec 2019 01:37:17 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1576568237; bh=uq4M6dCHylxyKFwJawgtPdUJOCVELJz3UBxlL6ZzTc4=; h=From:To:CC:Subject:Date; b=aXtLu1vIsWEzIZHmnvQmu8h9BoCJ7bOLYEp7+YCA8ruweISoRJN9RUSppN+8xgdAR rbiNl66Cym8qNXjnce+7+fMXBVS2AK5xtMAWCRB61/gtrLSouZi7CIGfHI7NZZFLo+ tqpUTjJTh+W5LybMSsFKRQClTes/VlL+AB3og8ag= Received: from DLEE105.ent.ti.com (dlee105.ent.ti.com [157.170.170.35]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id xBH7bHn7111365 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 17 Dec 2019 01:37:17 -0600 Received: from DLEE102.ent.ti.com (157.170.170.32) by DLEE105.ent.ti.com (157.170.170.35) 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 01:37:17 -0600 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE102.ent.ti.com (157.170.170.32) 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 01:37:17 -0600 Received: from feketebors.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id xBH7bFQB068169; Tue, 17 Dec 2019 01:37:15 -0600 From: Peter Ujfalusi To: CC: , , Subject: [PATCH] powerpc/512x: Use dma_request_chan() instead dma_request_slave_channel() Date: Tue, 17 Dec 2019 09:37:30 +0200 Message-ID: <20191217073730.21249-1-peter.ujfalusi@ti.com> X-Mailer: git-send-email 2.24.0 MIME-Version: 1.0 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 --- arch/powerpc/platforms/512x/mpc512x_lpbfifo.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) -- Peter Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki diff --git a/arch/powerpc/platforms/512x/mpc512x_lpbfifo.c b/arch/powerpc/platforms/512x/mpc512x_lpbfifo.c index 13631f35cd14..04bf6ecf7d55 100644 --- a/arch/powerpc/platforms/512x/mpc512x_lpbfifo.c +++ b/arch/powerpc/platforms/512x/mpc512x_lpbfifo.c @@ -434,9 +434,9 @@ static int mpc512x_lpbfifo_probe(struct platform_device *pdev) memset(&lpbfifo, 0, sizeof(struct lpbfifo_data)); spin_lock_init(&lpbfifo.lock); - lpbfifo.chan = dma_request_slave_channel(&pdev->dev, "rx-tx"); - if (lpbfifo.chan == NULL) - return -EPROBE_DEFER; + lpbfifo.chan = dma_request_chan(&pdev->dev, "rx-tx"); + if (IS_ERR(lpbfifo.chan)) + return PTR_ERR(lpbfifo.chan); if (of_address_to_resource(pdev->dev.of_node, 0, &r) != 0) { dev_err(&pdev->dev, "bad 'reg' in 'sclpc' device tree node\n");