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git://projects.qi-hardware.com/openwrt-xburst.git
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109 lines
3.4 KiB
Diff
109 lines
3.4 KiB
Diff
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From 0733a2e1b598dec898fef5066b737764170aaf62 Mon Sep 17 00:00:00 2001
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From: Andy Green <agreen@pads.home.warmcat.com>
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Date: Sun, 10 Aug 2008 09:27:16 +0100
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Subject: [PATCH] My GTA01 2.6.26 kernel was crashing within mmc_power_up(), at the first
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call to mmc_set_ios(host), due to host->ops being NULL. mmc_power_up()
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was being called by mmc_rescan().
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The only possible call path I can imagine for that is s3cmci_irq_cd
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getting called before host->ops is set, thus calling mmc_detect_change()
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which will schedule host->detect which is mmc_rescan.
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This patch avoids the problem by moving the enable of the gpio_detect
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interrupt to just before calling mmc_add_host(), where everything else
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is already set up.
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Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
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---
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drivers/mmc/host/s3cmci.c | 34 +++++++++++++++++-----------------
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1 files changed, 17 insertions(+), 17 deletions(-)
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diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
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index 9ef4d5b..107847a 100644
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--- a/drivers/mmc/host/s3cmci.c
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+++ b/drivers/mmc/host/s3cmci.c
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@@ -1226,17 +1226,6 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
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disable_irq(host->irq);
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- s3c2410_gpio_cfgpin(host->pdata->gpio_detect, S3C2410_GPIO_IRQ);
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- set_irq_type(host->irq_cd, IRQT_BOTHEDGE);
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-
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- if (request_irq(host->irq_cd, s3cmci_irq_cd, 0, DRIVER_NAME, host)) {
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- dev_err(&pdev->dev,
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- "failed to request card detect interrupt.\n");
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-
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- ret = -ENOENT;
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- goto probe_free_irq;
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- }
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-
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if (host->pdata->gpio_wprotect)
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s3c2410_gpio_cfgpin(host->pdata->gpio_wprotect,
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S3C2410_GPIO_INPUT);
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@@ -1244,7 +1233,7 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
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if (s3c2410_dma_request(host->dma, &s3cmci_dma_client, NULL)) {
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dev_err(&pdev->dev, "unable to get DMA channel.\n");
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ret = -EBUSY;
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- goto probe_free_irq_cd;
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+ goto probe_free_irq;
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}
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host->clk = clk_get(&pdev->dev, "sdi");
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@@ -1281,10 +1270,21 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
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"irq_cd:%u dma:%u.\n", (host->is2440?"2440":""),
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host->base, host->irq, host->irq_cd, host->dma);
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+ s3c2410_gpio_cfgpin(host->pdata->gpio_detect, S3C2410_GPIO_IRQ);
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+ set_irq_type(host->irq_cd, IRQT_BOTHEDGE);
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+
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+ if (request_irq(host->irq_cd, s3cmci_irq_cd, 0, DRIVER_NAME, host)) {
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+ dev_err(&pdev->dev,
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+ "failed to request card detect interrupt.\n");
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+
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+ ret = -ENOENT;
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+ goto probe_disable_clk;
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+ }
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+
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ret = mmc_add_host(mmc);
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if (ret) {
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dev_err(&pdev->dev, "failed to add mmc host.\n");
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- goto probe_disable_clk;
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+ goto probe_free_irq_cd;
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}
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platform_set_drvdata(pdev, mmc);
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@@ -1292,15 +1292,15 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
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dev_info(&pdev->dev, "initialisation done.\n");
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return 0;
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+ probe_free_irq_cd:
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+ free_irq(host->irq_cd, host);
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+
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probe_disable_clk:
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clk_disable(host->clk);
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probe_free_clk:
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clk_put(host->clk);
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- probe_free_irq_cd:
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- free_irq(host->irq_cd, host);
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-
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probe_free_dma:
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s3c2410_dma_free(host->dma, &s3cmci_dma_client);
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@@ -1325,10 +1325,10 @@ static int s3cmci_remove(struct platform_device *pdev)
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struct s3cmci_host *host = mmc_priv(mmc);
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mmc_remove_host(mmc);
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+ free_irq(host->irq_cd, host);
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clk_disable(host->clk);
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clk_put(host->clk);
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s3c2410_dma_free(host->dma, &s3cmci_dma_client);
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- free_irq(host->irq_cd, host);
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free_irq(host->irq, host);
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iounmap(host->base);
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release_mem_region(host->mem->start, RESSIZE(host->mem));
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--
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1.5.6.3
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