From patchwork Thu Oct 24 12:50:25 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: pekon gupta X-Patchwork-Id: 3091851 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B6B48BF924 for ; Thu, 24 Oct 2013 12:52:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 71C13204EB for ; Thu, 24 Oct 2013 12:52:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE3D7204E7 for ; Thu, 24 Oct 2013 12:52:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754624Ab3JXMwM (ORCPT ); Thu, 24 Oct 2013 08:52:12 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:60705 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755225Ab3JXMwL (ORCPT ); Thu, 24 Oct 2013 08:52:11 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id r9OCpXbU010476; Thu, 24 Oct 2013 07:51:33 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id r9OCpXJY009537; Thu, 24 Oct 2013 07:51:33 -0500 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.2.342.3; Thu, 24 Oct 2013 07:51:33 -0500 Received: from psplinux063.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id r9OCoYwn007145; Thu, 24 Oct 2013 07:51:27 -0500 From: Pekon Gupta To: , , , CC: , , , , , , , , , , , , , , , Pekon Gupta Subject: [PATCH v11 09/10] mtd: nand: omap: updated devm_xx for all resource allocation and free calls Date: Thu, 24 Oct 2013 18:20:25 +0530 Message-ID: <1382619026-4182-10-git-send-email-pekon@ti.com> X-Mailer: git-send-email 1.8.1 In-Reply-To: <1382619026-4182-1-git-send-email-pekon@ti.com> References: <1382619026-4182-1-git-send-email-pekon@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP "Managed Device Resource" or devm_xx calls takes care of automatic freeing of the resource in case of: - failure during driver probe - failure during resource allocation - detaching or unloading of driver module (rmmod) Reference: Documentation/driver-model/devres.txt Though OMAP NAND driver handles freeing of resource allocation in most of the cases, but using devm_xx provides more clean and effortless approach to handle all such cases. - simplifies label for exiting probe during error s/out_release_mem_region/return_error Signed-off-by: Pekon Gupta --- drivers/mtd/nand/omap2.c | 85 ++++++++++++++++++++---------------------------- 1 file changed, 35 insertions(+), 50 deletions(-) diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index 93aa35c..ec40b8d 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -1642,7 +1642,8 @@ static int omap_nand_probe(struct platform_device *pdev) return -ENODEV; } - info = kzalloc(sizeof(struct omap_nand_info), GFP_KERNEL); + info = devm_kzalloc(&pdev->dev, sizeof(struct omap_nand_info), + GFP_KERNEL); if (!info) return -ENOMEM; @@ -1667,22 +1668,23 @@ static int omap_nand_probe(struct platform_device *pdev) if (res == NULL) { err = -EINVAL; dev_err(&pdev->dev, "error getting memory resource\n"); - goto out_free_info; + goto return_error; } info->phys_base = res->start; info->mem_size = resource_size(res); - if (!request_mem_region(info->phys_base, info->mem_size, - pdev->dev.driver->name)) { + if (!devm_request_mem_region(&pdev->dev, info->phys_base, + info->mem_size, pdev->dev.driver->name)) { err = -EBUSY; - goto out_free_info; + goto return_error; } - nand_chip->IO_ADDR_R = ioremap(info->phys_base, info->mem_size); + nand_chip->IO_ADDR_R = devm_ioremap(&pdev->dev, info->phys_base, + info->mem_size); if (!nand_chip->IO_ADDR_R) { err = -ENOMEM; - goto out_release_mem_region; + goto return_error; } nand_chip->controller = &info->controller; @@ -1710,14 +1712,14 @@ static int omap_nand_probe(struct platform_device *pdev) if (nand_scan_ident(mtd, 1, NULL)) { pr_err("nand device scan failed, may be bus-width mismatch\n"); err = -ENXIO; - goto out_release_mem_region; + goto return_error; } /* check for small page devices */ if ((mtd->oobsize < 64) && (pdata->ecc_opt != OMAP_ECC_HAM1_CODE_HW)) { pr_err("small page devices are not supported\n"); err = -EINVAL; - goto out_release_mem_region; + goto return_error; } /* re-populate low-level callbacks based on xfer modes */ @@ -1745,7 +1747,7 @@ static int omap_nand_probe(struct platform_device *pdev) if (!info->dma) { dev_err(&pdev->dev, "DMA engine request failed\n"); err = -ENXIO; - goto out_release_mem_region; + goto return_error; } else { struct dma_slave_config cfg; @@ -1760,7 +1762,7 @@ static int omap_nand_probe(struct platform_device *pdev) if (err) { dev_err(&pdev->dev, "DMA engine slave config failed: %d\n", err); - goto out_release_mem_region; + goto return_error; } nand_chip->read_buf = omap_read_buf_dma_pref; nand_chip->write_buf = omap_write_buf_dma_pref; @@ -1772,30 +1774,32 @@ static int omap_nand_probe(struct platform_device *pdev) if (info->gpmc_irq_fifo <= 0) { dev_err(&pdev->dev, "error getting fifo irq\n"); err = -ENODEV; - goto out_release_mem_region; + goto return_error; } - err = request_irq(info->gpmc_irq_fifo, omap_nand_irq, - IRQF_SHARED, "gpmc-nand-fifo", info); + err = devm_request_irq(&pdev->dev, info->gpmc_irq_fifo, + omap_nand_irq, IRQF_SHARED, + "gpmc-nand-fifo", info); if (err) { dev_err(&pdev->dev, "requesting irq(%d) error:%d", info->gpmc_irq_fifo, err); info->gpmc_irq_fifo = 0; - goto out_release_mem_region; + goto return_error; } info->gpmc_irq_count = platform_get_irq(pdev, 1); if (info->gpmc_irq_count <= 0) { dev_err(&pdev->dev, "error getting count irq\n"); err = -ENODEV; - goto out_release_mem_region; + goto return_error; } - err = request_irq(info->gpmc_irq_count, omap_nand_irq, - IRQF_SHARED, "gpmc-nand-count", info); + err = devm_request_irq(&pdev->dev, info->gpmc_irq_count, + omap_nand_irq, IRQF_SHARED, + "gpmc-nand-count", info); if (err) { dev_err(&pdev->dev, "requesting irq(%d) error:%d", info->gpmc_irq_count, err); info->gpmc_irq_count = 0; - goto out_release_mem_region; + goto return_error; } nand_chip->read_buf = omap_read_buf_irq_pref; @@ -1807,7 +1811,7 @@ static int omap_nand_probe(struct platform_device *pdev) dev_err(&pdev->dev, "xfer_type(%d) not supported!\n", pdata->xfer_type); err = -EINVAL; - goto out_release_mem_region; + goto return_error; } /* populate MTD interface based on ECC scheme */ @@ -1865,7 +1869,7 @@ static int omap_nand_probe(struct platform_device *pdev) #else pr_err("nand: error: CONFIG_MTD_NAND_ECC_BCH not enabled\n"); err = -EINVAL; - goto out_release_mem_region; + goto return_error; #endif case OMAP_ECC_BCH4_CODE_HW: @@ -1892,13 +1896,13 @@ static int omap_nand_probe(struct platform_device *pdev) if (is_elm_present(info, pdata->elm_of_node, BCH4_ECC) < 0) { pr_err("nand: error: could not initialize ELM\n"); err = -ENODEV; - goto out_release_mem_region; + goto return_error; } break; #else pr_err("nand: error: CONFIG_MTD_NAND_OMAP_BCH not enabled\n"); err = -EINVAL; - goto out_release_mem_region; + goto return_error; #endif case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW: @@ -1926,13 +1930,13 @@ static int omap_nand_probe(struct platform_device *pdev) if (!nand_chip->ecc.priv) { pr_err("nand: error: unable to use s/w BCH library\n"); err = -EINVAL; - goto out_release_mem_region; + goto return_error; } break; #else pr_err("nand: error: CONFIG_MTD_NAND_ECC_BCH not enabled\n"); err = -EINVAL; - goto out_release_mem_region; + goto return_error; #endif case OMAP_ECC_BCH8_CODE_HW: @@ -1951,7 +1955,7 @@ static int omap_nand_probe(struct platform_device *pdev) /* This ECC scheme requires ELM H/W block */ if (is_elm_present(info, pdata->elm_of_node, BCH8_ECC) < 0) { pr_err("nand: error: could not initialize ELM\n"); - goto out_release_mem_region; + goto return_error; } /* define ECC layout */ ecclayout->eccbytes = nand_chip->ecc.bytes * @@ -1964,13 +1968,13 @@ static int omap_nand_probe(struct platform_device *pdev) #else pr_err("nand: error: CONFIG_MTD_NAND_OMAP_BCH not enabled\n"); err = -EINVAL; - goto out_release_mem_region; + goto return_error; #endif default: pr_err("nand: error: invalid or unsupported ECC scheme\n"); err = -EINVAL; - goto out_release_mem_region; + goto return_error; } /* populate remaining ECC layout data */ @@ -1983,13 +1987,13 @@ static int omap_nand_probe(struct platform_device *pdev) pr_err("not enough OOB bytes required = %d, available=%d\n", ecclayout->eccbytes, mtd->oobsize); err = -EINVAL; - goto out_release_mem_region; + goto return_error; } /* second phase scan */ if (nand_scan_tail(mtd)) { err = -ENXIO; - goto out_release_mem_region; + goto return_error; } ppdata.of_node = pdata->of_node; @@ -2000,21 +2004,13 @@ static int omap_nand_probe(struct platform_device *pdev) return 0; -out_release_mem_region: +return_error: if (info->dma) dma_release_channel(info->dma); - if (info->gpmc_irq_count > 0) - free_irq(info->gpmc_irq_count, info); - if (info->gpmc_irq_fifo > 0) - free_irq(info->gpmc_irq_fifo, info); - release_mem_region(info->phys_base, info->mem_size); -out_free_info: if (nand_chip->ecc.priv) { nand_bch_free(nand_chip->ecc.priv); nand_chip->ecc.priv = NULL; } - kfree(info); - return err; } @@ -2028,20 +2024,9 @@ static int omap_nand_remove(struct platform_device *pdev) nand_bch_free(nand_chip->ecc.priv); nand_chip->ecc.priv = NULL; } - if (info->dma) dma_release_channel(info->dma); - - if (info->gpmc_irq_count > 0) - free_irq(info->gpmc_irq_count, info); - if (info->gpmc_irq_fifo > 0) - free_irq(info->gpmc_irq_fifo, info); - - /* Release NAND device, its internal structures and partitions */ nand_release(mtd); - iounmap(nand_chip->IO_ADDR_R); - release_mem_region(info->phys_base, info->mem_size); - kfree(info); return 0; }