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mmc: pxamci: fix the device-tree probe deferral path 

When the gpio driver is probed after the mmc one, the read/write gpio
and card detection one return -EPROBE_DEFER. Unfortunately, the memory
region remains requested, and upon the next probe, the probe will fail
anyway with -EBUSY.

Fix this by releasing the memory resource upon probe failure.

More broadly, this patch uses devm_*() primitives whenever possible in
the probe function.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Robert Jarzmik 2016-02-08 15:17:57 +01:00 committed by Ulf Hansson
parent b00663124c
commit 07e7716c74
1 changed files with 9 additions and 26 deletions
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35
drivers/mmc/host/pxamci.c
View File

@ -86,7 +86,7 @@ struct pxamci_host {
static inline void pxamci_init_ocr(struct pxamci_host *host)
{
#ifdef CONFIG_REGULATOR
host->vcc = regulator_get_optional(mmc_dev(host->mmc), "vmmc");
host->vcc = devm_regulator_get_optional(mmc_dev(host->mmc), "vmmc");
if (IS_ERR(host->vcc))
host->vcc = NULL;
@ -654,12 +654,8 @@ static int pxamci_probe(struct platform_device *pdev)
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!r || irq < 0)
return -ENXIO;
r = request_mem_region(r->start, SZ_4K, DRIVER_NAME);
if (!r)
return -EBUSY;
if (irq < 0)
return irq;
mmc = mmc_alloc_host(sizeof(struct pxamci_host), &pdev->dev);
if (!mmc) {
@ -695,7 +691,7 @@ static int pxamci_probe(struct platform_device *pdev)
host->pdata = pdev->dev.platform_data;
host->clkrt = CLKRT_OFF;
host->clk = clk_get(&pdev->dev, NULL);
host->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(host->clk)) {
ret = PTR_ERR(host->clk);
host->clk = NULL;
@ -727,9 +723,9 @@ static int pxamci_probe(struct platform_device *pdev)
host->irq = irq;
host->imask = MMC_I_MASK_ALL;
host->base = ioremap(r->start, SZ_4K);
if (!host->base) {
ret = -ENOMEM;
host->base = devm_ioremap_resource(&pdev->dev, r);
if (IS_ERR(host->base)) {
ret = PTR_ERR(host->base);
goto out;
}
@ -742,7 +738,8 @@ static int pxamci_probe(struct platform_device *pdev)
writel(64, host->base + MMC_RESTO);
writel(host->imask, host->base + MMC_I_MASK);
ret = request_irq(host->irq, pxamci_irq, 0, DRIVER_NAME, host);
ret = devm_request_irq(&pdev->dev, host->irq, pxamci_irq, 0,
DRIVER_NAME, host);
if (ret)
goto out;
@ -833,14 +830,9 @@ static int pxamci_probe(struct platform_device *pdev)
dma_release_channel(host->dma_chan_rx);
if (host->dma_chan_tx)
dma_release_channel(host->dma_chan_tx);
if (host->base)
iounmap(host->base);
if (host->clk)
clk_put(host->clk);
}
if (mmc)
mmc_free_host(mmc);
release_resource(r);
return ret;
}
@ -859,9 +851,6 @@ static int pxamci_remove(struct platform_device *pdev)
gpio_ro = host->pdata->gpio_card_ro;
gpio_power = host->pdata->gpio_power;
}
if (host->vcc)
regulator_put(host->vcc);
if (host->pdata && host->pdata->exit)
host->pdata->exit(&pdev->dev, mmc);
@ -870,16 +859,10 @@ static int pxamci_remove(struct platform_device *pdev)
END_CMD_RES|PRG_DONE|DATA_TRAN_DONE,
host->base + MMC_I_MASK);
free_irq(host->irq, host);
dmaengine_terminate_all(host->dma_chan_rx);
dmaengine_terminate_all(host->dma_chan_tx);
dma_release_channel(host->dma_chan_rx);
dma_release_channel(host->dma_chan_tx);
iounmap(host->base);
clk_put(host->clk);
release_resource(host->res);
mmc_free_host(mmc);
}