From: Pekon Gupta Date: Thu, 24 Oct 2013 12:50:25 +0000 (+0530) Subject: mtd: nand: omap: updated devm_xx for all resource allocation and free calls X-Git-Tag: upstream/snapshot3+hdmi~3987^2~16 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=70ba6d71ddcde8aa5a6e2b7f616e77b4bb96b984;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git mtd: nand: omap: updated devm_xx for all resource allocation and free calls "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 Tested-by: Ezequiel Garcia Signed-off-by: Brian Norris --- 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; }