From 81ca70343f4d85637ac19b529dbcccd1db69a41d Mon Sep 17 00:00:00 2001 From: "Juha Yrjola juha.yrjola" Date: Sat, 11 Nov 2006 23:39:20 +0100 Subject: [PATCH] Platform device error handling cleanup This patch is part of Juha Yrjola's earlier patch to add platform device error handling and a BUG_ON to verify if host == NULL Signed-off-by: Carlos Eduardo Aguiar indt.org.br> Signed-off-by: Juha Yrjola solidboot.com> Signed-off-by: Pierre Ossman --- drivers/mmc/omap.c | 100 +++++++++++++++++++++++++++++++---------------------- 1 file changed, 59 insertions(+), 41 deletions(-) diff --git a/drivers/mmc/omap.c b/drivers/mmc/omap.c index 827753c..d46fd02 100644 --- a/drivers/mmc/omap.c +++ b/drivers/mmc/omap.c @@ -1022,25 +1022,29 @@ static int __init mmc_omap_probe(struct platform_device *pdev) struct omap_mmc_conf *minfo = pdev->dev.platform_data; struct mmc_host *mmc; struct mmc_omap_host *host = NULL; - struct resource *r; + struct resource *res; int ret = 0; int irq; - - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + if (minfo == NULL) { + dev_err(&pdev->dev, "platform data missing\n"); + return -ENXIO; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(pdev, 0); - if (!r || irq < 0) + if (res == NULL || irq < 0) return -ENXIO; - r = request_mem_region(pdev->resource[0].start, - pdev->resource[0].end - pdev->resource[0].start + 1, - pdev->name); - if (!r) + res = request_mem_region(res->start, res->end - res->start + 1, + pdev->name); + if (res == NULL) return -EBUSY; mmc = mmc_alloc_host(sizeof(struct mmc_omap_host), &pdev->dev); - if (!mmc) { + if (mmc == NULL) { ret = -ENOMEM; - goto out; + goto err_free_mem_region; } host = mmc_priv(mmc); @@ -1052,13 +1056,13 @@ static int __init mmc_omap_probe(struct platform_device *pdev) host->dma_timer.data = (unsigned long) host; host->id = pdev->id; - host->mem_res = r; + host->mem_res = res; host->irq = irq; if (cpu_is_omap24xx()) { host->iclk = clk_get(&pdev->dev, "mmc_ick"); if (IS_ERR(host->iclk)) - goto out; + goto err_free_mmc_host; clk_enable(host->iclk); } @@ -1069,7 +1073,7 @@ static int __init mmc_omap_probe(struct platform_device *pdev) if (IS_ERR(host->fclk)) { ret = PTR_ERR(host->fclk); - goto out; + goto err_free_iclk; } /* REVISIT: @@ -1082,7 +1086,7 @@ static int __init mmc_omap_probe(struct platform_device *pdev) host->use_dma = 1; host->dma_ch = -1; - host->irq = pdev->resource[1].start; + host->irq = irq; host->phys_base = host->mem_res->start; host->virt_base = (void __iomem *) IO_ADDRESS(host->phys_base); @@ -1108,20 +1112,18 @@ static int __init mmc_omap_probe(struct platform_device *pdev) if ((ret = omap_request_gpio(host->power_pin)) != 0) { dev_err(mmc_dev(host->mmc), "Unable to get GPIO pin for MMC power\n"); - goto out; + goto err_free_fclk; } omap_set_gpio_direction(host->power_pin, 0); } ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host); if (ret) - goto out; + goto err_free_power_gpio; host->dev = &pdev->dev; platform_set_drvdata(pdev, host); - mmc_add_host(mmc); - if (host->switch_pin >= 0) { INIT_WORK(&host->switch_work, mmc_omap_switch_handler, host); init_timer(&host->switch_timer); @@ -1159,10 +1161,11 @@ static int __init mmc_omap_probe(struct platform_device *pdev) schedule_work(&host->switch_work); } -no_switch: + mmc_add_host(mmc); + return 0; -out: +no_switch: /* FIXME: Free other resources too. */ if (host) { if (host->iclk && !IS_ERR(host->iclk)) @@ -1171,6 +1174,20 @@ out: clk_put(host->fclk); mmc_free_host(host->mmc); } +err_free_power_gpio: + if (host->power_pin >= 0) + omap_free_gpio(host->power_pin); +err_free_fclk: + clk_put(host->fclk); +err_free_iclk: + if (host->iclk != NULL) { + clk_disable(host->iclk); + clk_put(host->iclk); + } +err_free_mmc_host: + mmc_free_host(host->mmc); +err_free_mem_region: + release_mem_region(res->start, res->end - res->start + 1); return ret; } @@ -1180,30 +1197,31 @@ static int mmc_omap_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); - if (host) { - mmc_remove_host(host->mmc); - free_irq(host->irq, host); - - if (host->power_pin >= 0) - omap_free_gpio(host->power_pin); - if (host->switch_pin >= 0) { - device_remove_file(&pdev->dev, &dev_attr_enable_poll); - device_remove_file(&pdev->dev, &dev_attr_cover_switch); - free_irq(OMAP_GPIO_IRQ(host->switch_pin), host); - omap_free_gpio(host->switch_pin); - host->switch_pin = -1; - del_timer_sync(&host->switch_timer); - flush_scheduled_work(); - } - if (host->iclk && !IS_ERR(host->iclk)) - clk_put(host->iclk); - if (host->fclk && !IS_ERR(host->fclk)) - clk_put(host->fclk); - mmc_free_host(host->mmc); + BUG_ON(host == NULL); + + mmc_remove_host(host->mmc); + free_irq(host->irq, host); + + if (host->power_pin >= 0) + omap_free_gpio(host->power_pin); + if (host->switch_pin >= 0) { + device_remove_file(&pdev->dev, &dev_attr_enable_poll); + device_remove_file(&pdev->dev, &dev_attr_cover_switch); + free_irq(OMAP_GPIO_IRQ(host->switch_pin), host); + omap_free_gpio(host->switch_pin); + host->switch_pin = -1; + del_timer_sync(&host->switch_timer); + flush_scheduled_work(); } + if (host->iclk && !IS_ERR(host->iclk)) + clk_put(host->iclk); + if (host->fclk && !IS_ERR(host->fclk)) + clk_put(host->fclk); release_mem_region(pdev->resource[0].start, - pdev->resource[0].end - pdev->resource[0].start + 1); + pdev->resource[0].end - pdev->resource[0].start + 1); + + mmc_free_host(host->mmc); return 0; } -- 2.7.4