mmc: davinci: fix unwinding in probe
Unwiding from an error in davinci_mmcsd_probe was a mess. Some errors were not handled and not all paths unwound correctly. Also using devm_ where possible to simplify things. Signed-off-by: David Lechner <david@lechnology.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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2edeb8540b
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@ -1205,7 +1205,7 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
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struct mmc_davinci_host *host = NULL;
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struct mmc_host *mmc = NULL;
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struct resource *r, *mem = NULL;
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int ret = 0, irq = 0;
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int ret, irq;
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size_t mem_size;
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const struct platform_device_id *id_entry;
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@ -1215,38 +1215,40 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
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return -ENOENT;
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}
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ret = -ENODEV;
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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irq = platform_get_irq(pdev, 0);
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if (!r || irq == NO_IRQ)
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goto out;
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return -ENODEV;
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ret = -EBUSY;
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mem_size = resource_size(r);
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mem = request_mem_region(r->start, mem_size, pdev->name);
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mem = devm_request_mem_region(&pdev->dev, r->start, mem_size,
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pdev->name);
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if (!mem)
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goto out;
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return -EBUSY;
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ret = -ENOMEM;
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mmc = mmc_alloc_host(sizeof(struct mmc_davinci_host), &pdev->dev);
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if (!mmc)
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goto out;
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return -ENOMEM;
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host = mmc_priv(mmc);
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host->mmc = mmc; /* Important */
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host->mem_res = mem;
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host->base = ioremap(mem->start, mem_size);
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if (!host->base)
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goto out;
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host->base = devm_ioremap(&pdev->dev, mem->start, mem_size);
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if (!host->base) {
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ret = -ENOMEM;
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goto ioremap_fail;
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}
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ret = -ENXIO;
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host->clk = clk_get(&pdev->dev, NULL);
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host->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(host->clk)) {
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ret = PTR_ERR(host->clk);
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goto out;
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goto clk_get_fail;
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}
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clk_enable(host->clk);
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ret = clk_enable(host->clk);
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if (ret)
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goto clk_enable_fail;
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host->mmc_input_clk = clk_get_rate(host->clk);
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init_mmcsd_host(host);
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@ -1264,7 +1266,7 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
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if (host->use_dma) {
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ret = davinci_acquire_dma_channels(host);
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if (ret == -EPROBE_DEFER)
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goto out;
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goto dma_probe_defer;
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else if (ret)
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host->use_dma = 0;
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}
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@ -1321,14 +1323,16 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
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ret = mmc_add_host(mmc);
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if (ret < 0)
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goto out;
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goto mmc_add_host_fail;
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ret = request_irq(irq, mmc_davinci_irq, 0, mmc_hostname(mmc), host);
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ret = devm_request_irq(&pdev->dev, irq, mmc_davinci_irq, 0,
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mmc_hostname(mmc), host);
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if (ret)
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goto out;
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goto request_irq_fail;
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if (host->sdio_irq >= 0) {
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ret = request_irq(host->sdio_irq, mmc_davinci_sdio_irq, 0,
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ret = devm_request_irq(&pdev->dev, host->sdio_irq,
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mmc_davinci_sdio_irq, 0,
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mmc_hostname(mmc), host);
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if (!ret)
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mmc->caps |= MMC_CAP_SDIO_IRQ;
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@ -1342,29 +1346,19 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
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return 0;
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out:
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request_irq_fail:
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mmc_remove_host(mmc);
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mmc_add_host_fail:
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mmc_davinci_cpufreq_deregister(host);
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cpu_freq_fail:
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if (host) {
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davinci_release_dma_channels(host);
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if (host->clk) {
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dma_probe_defer:
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clk_disable(host->clk);
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clk_put(host->clk);
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}
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if (host->base)
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iounmap(host->base);
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}
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if (mmc)
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clk_enable_fail:
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clk_get_fail:
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ioremap_fail:
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mmc_free_host(mmc);
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if (mem)
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release_resource(mem);
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dev_dbg(&pdev->dev, "probe err %d\n", ret);
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return ret;
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}
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@ -1372,25 +1366,11 @@ static int __exit davinci_mmcsd_remove(struct platform_device *pdev)
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{
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struct mmc_davinci_host *host = platform_get_drvdata(pdev);
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if (host) {
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mmc_davinci_cpufreq_deregister(host);
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mmc_remove_host(host->mmc);
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free_irq(host->mmc_irq, host);
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if (host->mmc->caps & MMC_CAP_SDIO_IRQ)
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free_irq(host->sdio_irq, host);
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mmc_davinci_cpufreq_deregister(host);
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davinci_release_dma_channels(host);
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clk_disable(host->clk);
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clk_put(host->clk);
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iounmap(host->base);
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release_resource(host->mem_res);
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mmc_free_host(host->mmc);
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}
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return 0;
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}
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