From: Pekon Gupta <pekon@ti.com>
To: mark.rutland@arm.com, olof@lixom.net,
computersforpeace@gmail.com, dedekind1@gmail.com
Cc: robherring2@gmail.com, Pawel.Moll@arm.com,
ijc+devicetree@hellion.org.uk, swarren@wwwdotorg.org,
dwmw2@infradead.org, arnd@arndb.de, tony@atomide.com,
bcousson@baylibre.com, avinashphilipk@gmail.com, balbi@ti.com,
linux-mtd@lists.infradead.org, linux-omap@vger.kernel.org,
devicetree@vger.kernel.org, jp.francois@cynove.com,
ivan.djelic@parrot.com, Pekon Gupta <pekon@ti.com>
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 [thread overview]
Message-ID: <1382619026-4182-10-git-send-email-pekon@ti.com> (raw)
In-Reply-To: <1382619026-4182-1-git-send-email-pekon@ti.com>
"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 <pekon@ti.com>
---
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;
}
--
1.8.1
next prev parent reply other threads:[~2013-10-24 12:50 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-24 12:50 [PATCH v11 00/10] [PATCH v10 00/10] mtd:nand:omap2: clean-up of supported ECC schemes Pekon Gupta
2013-10-24 12:50 ` [PATCH v11 01/10] ARM: OMAP2+: cleaned-up DT support of various " Pekon Gupta
2013-10-24 12:50 ` [PATCH v11 02/10] mtd: nand: omap: combine different flavours of 1-bit hamming ecc schemes Pekon Gupta
2013-10-24 12:50 ` [PATCH v11 03/10] mtd: nand: omap: cleanup: replace local references with generic framework names Pekon Gupta
2013-10-24 12:50 ` [PATCH v11 04/10] mtd: nand: omap: use DT specified bus-width only for scanning NAND device Pekon Gupta
2013-10-24 21:27 ` Ezequiel Garcia
2013-10-24 22:43 ` Brian Norris
2013-10-24 22:49 ` Ezequiel Garcia
2013-10-24 12:50 ` [PATCH v11 05/10] mtd:nand:omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in device_probe Pekon Gupta
[not found] ` <1382619026-4182-1-git-send-email-pekon-l0cyMroinI0@public.gmane.org>
2013-10-24 12:50 ` [PATCH v11 06/10] mtd: nand: omap: clean-up ecc layout for BCH ecc schemes Pekon Gupta
2013-10-24 12:50 ` [PATCH v11 10/10] mtd: nand: omap: remove selection of BCH ecc-scheme via KConfig Pekon Gupta
2013-10-24 12:50 ` [PATCH v11 07/10] mtd: nand: omap: use drivers/mtd/nand/nand_bch.c wrapper for BCH ECC instead of lib/bch.c Pekon Gupta
2013-10-24 12:50 ` [PATCH v11 08/10] ARM: dts: AM33xx: updated default ECC scheme in nand-ecc-opt Pekon Gupta
2013-10-24 12:50 ` Pekon Gupta [this message]
2013-10-24 13:52 ` [PATCH v11 00/10] [PATCH v10 00/10] mtd:nand:omap2: clean-up of supported ECC schemes Ezequiel Garcia
2013-10-30 3:59 ` Brian Norris
2013-10-30 9:16 ` Ezequiel Garcia
2013-10-30 21:30 ` Gupta, Pekon
2013-10-31 21:23 ` Tony Lindgren
2013-11-01 20:10 ` Gupta, Pekon
2013-10-25 10:56 ` Ezequiel Garcia
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