On 8 February 2016 at 15:17, Robert Jarzmik <robert.jarzmik@xxxxxxx> wrote:
> 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@xxxxxxx>
Thanks, applied for fixes!
Kind regards
Uffe
> ---
> Since v1: broaden the devm_*() enveloppe
> Since v2: further broaden devm_*(): regulator + clock
> ---
> drivers/mmc/host/pxamci.c | 35 +++++++++--------------------------
> 1 file changed, 9 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
> index 28a057fae0a1..da824772bbb4 100644
> --- a/drivers/mmc/host/pxamci.c
> +++ b/drivers/mmc/host/pxamci.c
> @@ -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 @@ out:
> 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);
> }
> --
> 2.1.4
>
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