From patchwork Tue Apr 17 13:49:17 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Janusz Krzysztofik X-Patchwork-Id: 153184 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:4978:20e::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 2A9A7B7072 for ; Tue, 17 Apr 2012 23:56:41 +1000 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SK8sR-0007BG-Jb; Tue, 17 Apr 2012 13:55:27 +0000 Received: from casper.infradead.org ([2001:770:15f::2]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1SK8sP-0007Aw-MZ for linux-mtd@merlin.infradead.org; Tue, 17 Apr 2012 13:55:25 +0000 Received: from d1.icnet.pl ([212.160.220.21]) by casper.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SK8sJ-0006iy-Vd for linux-mtd@lists.infradead.org; Tue, 17 Apr 2012 13:55:24 +0000 Received: from 87-205-12-81.ip.netia.com.pl ([87.205.12.81] helo=localhost.localdomain) by d1.icnet.pl with asmtp (TLS-1.0:DHE_RSA_3DES_EDE_CBC_SHA:24) (Exim 4.34) id 1SK8s8-000162-Hw; Tue, 17 Apr 2012 15:55:08 +0200 From: Janusz Krzysztofik To: David Woodhouse Subject: [PATCH v3.4-rc3] MTD: NAND: ams-delta: Fix request_mem_region() failure Date: Tue, 17 Apr 2012 15:49:17 +0200 Message-Id: <1334670557-25640-1-git-send-email-jkrzyszt@tis.icnet.pl> X-Mailer: git-send-email 1.7.3.4 X-SA-Exim-Scanned: No (on d1.icnet); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20120417_145520_381149_6632AAF0 X-CRM114-Status: GOOD ( 12.89 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on casper.infradead.org summary: Content analysis details: (-1.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Janusz Krzysztofik , Tony Lindgren , Artem Bityutskiy , linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-omap@vger.kernel.org X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org A call to request_mem_region() has been introduced in the omap-gpio driver recently (commit 96751fcbe5438e95514b025e9cee7a6d38038f40, "gpio/omap: Use devm_ API and add request_mem_region"). This change prevented the Amstrad Delta NAND driver, which was doing the same in order to take control over OMAP MPU I/O lines that the NAND device hangs off, from loading successfully. There is another driver, omap-keypad, which also manipulates OMAP MPUIO registers, but has never been calling request_mem_region() on startup, so it's not affected by the change in the gpio-omap and works correctly. Drop request_mem_region() call and related bits from ams-delta NAND driver. Created and tested against linux-3.4-rc3. Signed-off-by: Janusz Krzysztofik Acked-by: Tony Lindgren --- drivers/mtd/nand/ams-delta.c | 12 +----------- 1 files changed, 1 insertions(+), 11 deletions(-) diff --git a/drivers/mtd/nand/ams-delta.c b/drivers/mtd/nand/ams-delta.c index 7341695..af76da3 100644 --- a/drivers/mtd/nand/ams-delta.c +++ b/drivers/mtd/nand/ams-delta.c @@ -212,18 +212,11 @@ static int __devinit ams_delta_init(struct platform_device *pdev) /* Link the private data with the MTD structure */ ams_delta_mtd->priv = this; - if (!request_mem_region(res->start, resource_size(res), - dev_name(&pdev->dev))) { - dev_err(&pdev->dev, "request_mem_region failed\n"); - err = -EBUSY; - goto out_free; - } - io_base = ioremap(res->start, resource_size(res)); if (io_base == NULL) { dev_err(&pdev->dev, "ioremap failed\n"); err = -EIO; - goto out_release_io; + goto out_free; } this->priv = io_base; @@ -271,8 +264,6 @@ out_gpio: platform_set_drvdata(pdev, NULL); gpio_free(AMS_DELTA_GPIO_PIN_NAND_RB); iounmap(io_base); -out_release_io: - release_mem_region(res->start, resource_size(res)); out_free: kfree(ams_delta_mtd); out: @@ -293,7 +284,6 @@ static int __devexit ams_delta_cleanup(struct platform_device *pdev) gpio_free_array(_mandatory_gpio, ARRAY_SIZE(_mandatory_gpio)); gpio_free(AMS_DELTA_GPIO_PIN_NAND_RB); iounmap(io_base); - release_mem_region(res->start, resource_size(res)); /* Free the MTD device structure */ kfree(ams_delta_mtd);