mtd: atmel_nand: use devm_xxx gpio kzalloc, gpio and ioremap

this will allow to simply the error and remove path

Cc: linux-mtd@lists.infradead.org
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
[josh.wu@atmel.com: fix checkpatch warnings and rebase to latest mtd git tree]
[josh.wu@atmel.com: replace devm_request_and_ioremap with devm_ioremap_resource]
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index a43adce..3d7db95 100644 (file)
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -358,43 +358,34 @@ static void __iomem *pmecc_get_alpha_to(struct atmel_nand_host *host)
                        table_size * sizeof(int16_t);
 }
 
-static void pmecc_data_free(struct atmel_nand_host *host)
-{
-       kfree(host->pmecc_partial_syn);
-       kfree(host->pmecc_si);
-       kfree(host->pmecc_lmu);
-       kfree(host->pmecc_smu);
-       kfree(host->pmecc_mu);
-       kfree(host->pmecc_dmu);
-       kfree(host->pmecc_delta);
-}
-
 static int pmecc_data_alloc(struct atmel_nand_host *host)
 {
        const int cap = host->pmecc_corr_cap;
+       int size;
+
+       size = (2 * cap + 1) * sizeof(int16_t);
+       host->pmecc_partial_syn = devm_kzalloc(host->dev, size, GFP_KERNEL);
+       host->pmecc_si = devm_kzalloc(host->dev, size, GFP_KERNEL);
+       host->pmecc_lmu = devm_kzalloc(host->dev,
+                       (cap + 1) * sizeof(int16_t), GFP_KERNEL);
+       host->pmecc_smu = devm_kzalloc(host->dev,
+                       (cap + 2) * size, GFP_KERNEL);
+
+       size = (cap + 1) * sizeof(int);
+       host->pmecc_mu = devm_kzalloc(host->dev, size, GFP_KERNEL);
+       host->pmecc_dmu = devm_kzalloc(host->dev, size, GFP_KERNEL);
+       host->pmecc_delta = devm_kzalloc(host->dev, size, GFP_KERNEL);
+
+       if (!host->pmecc_partial_syn ||
+               !host->pmecc_si ||
+               !host->pmecc_lmu ||
+               !host->pmecc_smu ||
+               !host->pmecc_mu ||
+               !host->pmecc_dmu ||
+               !host->pmecc_delta)
+               return -ENOMEM;
 
-       host->pmecc_partial_syn = kzalloc((2 * cap + 1) * sizeof(int16_t),
-                                       GFP_KERNEL);
-       host->pmecc_si = kzalloc((2 * cap + 1) * sizeof(int16_t), GFP_KERNEL);
-       host->pmecc_lmu = kzalloc((cap + 1) * sizeof(int16_t), GFP_KERNEL);
-       host->pmecc_smu = kzalloc((cap + 2) * (2 * cap + 1) * sizeof(int16_t),
-                                       GFP_KERNEL);
-       host->pmecc_mu = kzalloc((cap + 1) * sizeof(int), GFP_KERNEL);
-       host->pmecc_dmu = kzalloc((cap + 1) * sizeof(int), GFP_KERNEL);
-       host->pmecc_delta = kzalloc((cap + 1) * sizeof(int), GFP_KERNEL);
-
-       if (host->pmecc_partial_syn &&
-                       host->pmecc_si &&
-                       host->pmecc_lmu &&
-                       host->pmecc_smu &&
-                       host->pmecc_mu &&
-                       host->pmecc_dmu &&
-                       host->pmecc_delta)
-               return 0;
-
-       /* error happened */
-       pmecc_data_free(host);
-       return -ENOMEM;
+       return 0;
 }
 
 static void pmecc_gen_syndrome(struct mtd_info *mtd, int sector)
@@ -1015,27 +1006,28 @@ static int __init atmel_pmecc_nand_init_params(struct platform_device *pdev,
                return 0;
        }
 
-       host->ecc = ioremap(regs->start, resource_size(regs));
-       if (host->ecc == NULL) {
+       host->ecc = devm_ioremap_resource(&pdev->dev, regs);
+       if (IS_ERR(host->ecc)) {
                dev_err(host->dev, "ioremap failed\n");
-               err_no = -EIO;
-               goto err_pmecc_ioremap;
+               err_no = PTR_ERR(host->ecc);
+               goto err;
        }
 
        regs_pmerr = platform_get_resource(pdev, IORESOURCE_MEM, 2);
-       regs_rom = platform_get_resource(pdev, IORESOURCE_MEM, 3);
-       if (regs_pmerr && regs_rom) {
-               host->pmerrloc_base = ioremap(regs_pmerr->start,
-                       resource_size(regs_pmerr));
-               host->pmecc_rom_base = ioremap(regs_rom->start,
-                       resource_size(regs_rom));
+       host->pmerrloc_base = devm_ioremap_resource(&pdev->dev, regs_pmerr);
+       if (IS_ERR(host->pmerrloc_base)) {
+               dev_err(host->dev,
+                       "Can not get I/O resource for PMECC ERRLOC controller!\n");
+               err_no = PTR_ERR(host->pmerrloc_base);
+               goto err;
        }
 
-       if (!host->pmerrloc_base || !host->pmecc_rom_base) {
-               dev_err(host->dev,
-                       "Can not get I/O resource for PMECC ERRLOC controller or ROM!\n");
-               err_no = -EIO;
-               goto err_pmloc_ioremap;
+       regs_rom = platform_get_resource(pdev, IORESOURCE_MEM, 3);
+       host->pmecc_rom_base = devm_ioremap_resource(&pdev->dev, regs_rom);
+       if (IS_ERR(host->pmecc_rom_base)) {
+               dev_err(host->dev, "Can not get I/O resource for ROM!\n");
+               err_no = PTR_ERR(host->pmecc_rom_base);
+               goto err;
        }
 
        /* ECC is calculated for the whole page (1 step) */
@@ -1060,7 +1052,7 @@ static int __init atmel_pmecc_nand_init_params(struct platform_device *pdev,
                if (nand_chip->ecc.bytes > mtd->oobsize - 2) {
                        dev_err(host->dev, "No room for ECC bytes\n");
                        err_no = -EINVAL;
-                       goto err_no_ecc_room;
+                       goto err;
                }
                pmecc_config_ecc_layout(&atmel_pmecc_oobinfo,
                                        mtd->oobsize,
@@ -1085,7 +1077,7 @@ static int __init atmel_pmecc_nand_init_params(struct platform_device *pdev,
        if (err_no) {
                dev_err(host->dev,
                                "Cannot allocate memory for PMECC computation!\n");
-               goto err_pmecc_data_alloc;
+               goto err;
        }
 
        nand_chip->ecc.read_page = atmel_nand_pmecc_read_page;
@@ -1095,15 +1087,7 @@ static int __init atmel_pmecc_nand_init_params(struct platform_device *pdev,
 
        return 0;
 
-err_pmecc_data_alloc:
-err_no_ecc_room:
-err_pmloc_ioremap:
-       iounmap(host->ecc);
-       if (host->pmerrloc_base)
-               iounmap(host->pmerrloc_base);
-       if (host->pmecc_rom_base)
-               iounmap(host->pmecc_rom_base);
-err_pmecc_ioremap:
+err:
        return err_no;
 }
 
@@ -1407,10 +1391,10 @@ static int __init atmel_hw_nand_init_params(struct platform_device *pdev,
                return 0;
        }
 
-       host->ecc = ioremap(regs->start, resource_size(regs));
-       if (host->ecc == NULL) {
+       host->ecc = devm_ioremap_resource(&pdev->dev, regs);
+       if (IS_ERR(host->ecc)) {
                dev_err(host->dev, "ioremap failed\n");
-               return -EIO;
+               return PTR_ERR(host->ecc);
        }
 
        /* ECC is calculated for the whole page (1 step) */
@@ -1464,27 +1448,21 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
        struct mtd_part_parser_data ppdata = {};
        int res;
 
-       mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!mem) {
-               printk(KERN_ERR "atmel_nand: can't get I/O resource mem\n");
-               return -ENXIO;
-       }
-
        /* Allocate memory for the device structure (and zero it) */
-       host = kzalloc(sizeof(struct atmel_nand_host), GFP_KERNEL);
+       host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
        if (!host) {
                printk(KERN_ERR "atmel_nand: failed to allocate device structure.\n");
                return -ENOMEM;
        }
 
-       host->io_phys = (dma_addr_t)mem->start;
-
-       host->io_base = ioremap(mem->start, resource_size(mem));
-       if (host->io_base == NULL) {
-               printk(KERN_ERR "atmel_nand: ioremap failed\n");
-               res = -EIO;
+       mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       host->io_base = devm_ioremap_resource(&pdev->dev, mem);
+       if (IS_ERR(host->io_base)) {
+               dev_err(&pdev->dev, "atmel_nand: ioremap resource failed\n");
+               res = PTR_ERR(host->io_base);
                goto err_nand_ioremap;
        }
+       host->io_phys = (dma_addr_t)mem->start;
 
        mtd = &host->mtd;
        nand_chip = &host->nand_chip;
@@ -1492,7 +1470,7 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
        if (pdev->dev.of_node) {
                res = atmel_of_init_port(host, pdev->dev.of_node);
                if (res)
-                       goto err_ecc_ioremap;
+                       goto err_nand_ioremap;
        } else {
                memcpy(&host->board, pdev->dev.platform_data,
                       sizeof(struct atmel_nand_data));
@@ -1508,12 +1486,13 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
        nand_chip->cmd_ctrl = atmel_nand_cmd_ctrl;
 
        if (gpio_is_valid(host->board.rdy_pin)) {
-               res = gpio_request(host->board.rdy_pin, "nand_rdy");
+               res = devm_gpio_request(&pdev->dev,
+                               host->board.rdy_pin, "nand_rdy");
                if (res < 0) {
                        dev_err(&pdev->dev,
                                "can't request rdy gpio %d\n",
                                host->board.rdy_pin);
-                       goto err_ecc_ioremap;
+                       goto err_nand_ioremap;
                }
 
                res = gpio_direction_input(host->board.rdy_pin);
@@ -1521,19 +1500,20 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
                        dev_err(&pdev->dev,
                                "can't request input direction rdy gpio %d\n",
                                host->board.rdy_pin);
-                       goto err_ecc_ioremap;
+                       goto err_nand_ioremap;
                }
 
                nand_chip->dev_ready = atmel_nand_device_ready;
        }
 
        if (gpio_is_valid(host->board.enable_pin)) {
-               res = gpio_request(host->board.enable_pin, "nand_enable");
+               res = devm_gpio_request(&pdev->dev,
+                               host->board.enable_pin, "nand_enable");
                if (res < 0) {
                        dev_err(&pdev->dev,
                                "can't request enable gpio %d\n",
                                host->board.enable_pin);
-                       goto err_ecc_ioremap;
+                       goto err_nand_ioremap;
                }
 
                res = gpio_direction_output(host->board.enable_pin, 1);
@@ -1541,7 +1521,7 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
                        dev_err(&pdev->dev,
                                "can't request output direction enable gpio %d\n",
                                host->board.enable_pin);
-                       goto err_ecc_ioremap;
+                       goto err_nand_ioremap;
                }
        }
 
@@ -1558,7 +1538,8 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
        atmel_nand_enable(host);
 
        if (gpio_is_valid(host->board.det_pin)) {
-               res = gpio_request(host->board.det_pin, "nand_det");
+               res = devm_gpio_request(&pdev->dev,
+                               host->board.det_pin, "nand_det");
                if (res < 0) {
                        dev_err(&pdev->dev,
                                "can't request det gpio %d\n",
@@ -1636,26 +1617,15 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
                return res;
 
 err_scan_tail:
-       if (host->has_pmecc && host->nand_chip.ecc.mode == NAND_ECC_HW) {
+       if (host->has_pmecc && host->nand_chip.ecc.mode == NAND_ECC_HW)
                pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
-               pmecc_data_free(host);
-       }
-       if (host->ecc)
-               iounmap(host->ecc);
-       if (host->pmerrloc_base)
-               iounmap(host->pmerrloc_base);
-       if (host->pmecc_rom_base)
-               iounmap(host->pmecc_rom_base);
 err_hw_ecc:
 err_scan_ident:
 err_no_card:
        atmel_nand_disable(host);
        if (host->dma_chan)
                dma_release_channel(host->dma_chan);
-err_ecc_ioremap:
-       iounmap(host->io_base);
 err_nand_ioremap:
-       kfree(host);
        return res;
 }
 
@@ -1675,31 +1645,11 @@ static int __exit atmel_nand_remove(struct platform_device *pdev)
                pmecc_writel(host->ecc, CTRL, PMECC_CTRL_DISABLE);
                pmerrloc_writel(host->pmerrloc_base, ELDIS,
                                PMERRLOC_DISABLE);
-               pmecc_data_free(host);
        }
 
-       if (gpio_is_valid(host->board.det_pin))
-               gpio_free(host->board.det_pin);
-
-       if (gpio_is_valid(host->board.enable_pin))
-               gpio_free(host->board.enable_pin);
-
-       if (gpio_is_valid(host->board.rdy_pin))
-               gpio_free(host->board.rdy_pin);
-
-       if (host->ecc)
-               iounmap(host->ecc);
-       if (host->pmecc_rom_base)
-               iounmap(host->pmecc_rom_base);
-       if (host->pmerrloc_base)
-               iounmap(host->pmerrloc_base);
-
        if (host->dma_chan)
                dma_release_channel(host->dma_chan);
 
-       iounmap(host->io_base);
-       kfree(host);
-
        return 0;
 }