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 <carlos.aguiar <at> indt.org.br>
Signed-off-by: Juha Yrjola <juha.yrjola <at> solidboot.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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 @@
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 @@
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 @@
if (IS_ERR(host->fclk)) {
ret = PTR_ERR(host->fclk);
- goto out;
+ goto err_free_iclk;
}
/* REVISIT:
@@ -1082,7 +1086,7 @@
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 @@
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 @@
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 @@
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 @@
platform_set_drvdata(pdev, NULL);
- if (host) {
- mmc_remove_host(host->mmc);
- free_irq(host->irq, host);
+ BUG_ON(host == NULL);
- 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);
+ 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;
}