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Diffstat (limited to 'target/linux/s3c24xx/patches/0251-My-GTA01-2.6.26-kernel-was-crashing-within-mmc_power.patch')
-rwxr-xr-xtarget/linux/s3c24xx/patches/0251-My-GTA01-2.6.26-kernel-was-crashing-within-mmc_power.patch108
1 files changed, 108 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0251-My-GTA01-2.6.26-kernel-was-crashing-within-mmc_power.patch b/target/linux/s3c24xx/patches/0251-My-GTA01-2.6.26-kernel-was-crashing-within-mmc_power.patch
new file mode 100755
index 0000000000..e312075b23
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0251-My-GTA01-2.6.26-kernel-was-crashing-within-mmc_power.patch
@@ -0,0 +1,108 @@
+From 0733a2e1b598dec898fef5066b737764170aaf62 Mon Sep 17 00:00:00 2001
+From: Andy Green <agreen@pads.home.warmcat.com>
+Date: Sun, 10 Aug 2008 09:27:16 +0100
+Subject: [PATCH] My GTA01 2.6.26 kernel was crashing within mmc_power_up(), at the first
+ call to mmc_set_ios(host), due to host->ops being NULL. mmc_power_up()
+ was being called by mmc_rescan().
+
+The only possible call path I can imagine for that is s3cmci_irq_cd
+getting called before host->ops is set, thus calling mmc_detect_change()
+which will schedule host->detect which is mmc_rescan.
+
+This patch avoids the problem by moving the enable of the gpio_detect
+interrupt to just before calling mmc_add_host(), where everything else
+is already set up.
+
+Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
+---
+ drivers/mmc/host/s3cmci.c | 34 +++++++++++++++++-----------------
+ 1 files changed, 17 insertions(+), 17 deletions(-)
+
+diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
+index 9ef4d5b..107847a 100644
+--- a/drivers/mmc/host/s3cmci.c
++++ b/drivers/mmc/host/s3cmci.c
+@@ -1226,17 +1226,6 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
+
+ disable_irq(host->irq);
+
+- s3c2410_gpio_cfgpin(host->pdata->gpio_detect, S3C2410_GPIO_IRQ);
+- set_irq_type(host->irq_cd, IRQT_BOTHEDGE);
+-
+- if (request_irq(host->irq_cd, s3cmci_irq_cd, 0, DRIVER_NAME, host)) {
+- dev_err(&pdev->dev,
+- "failed to request card detect interrupt.\n");
+-
+- ret = -ENOENT;
+- goto probe_free_irq;
+- }
+-
+ if (host->pdata->gpio_wprotect)
+ s3c2410_gpio_cfgpin(host->pdata->gpio_wprotect,
+ S3C2410_GPIO_INPUT);
+@@ -1244,7 +1233,7 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
+ if (s3c2410_dma_request(host->dma, &s3cmci_dma_client, NULL)) {
+ dev_err(&pdev->dev, "unable to get DMA channel.\n");
+ ret = -EBUSY;
+- goto probe_free_irq_cd;
++ goto probe_free_irq;
+ }
+
+ host->clk = clk_get(&pdev->dev, "sdi");
+@@ -1281,10 +1270,21 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
+ "irq_cd:%u dma:%u.\n", (host->is2440?"2440":""),
+ host->base, host->irq, host->irq_cd, host->dma);
+
++ s3c2410_gpio_cfgpin(host->pdata->gpio_detect, S3C2410_GPIO_IRQ);
++ set_irq_type(host->irq_cd, IRQT_BOTHEDGE);
++
++ if (request_irq(host->irq_cd, s3cmci_irq_cd, 0, DRIVER_NAME, host)) {
++ dev_err(&pdev->dev,
++ "failed to request card detect interrupt.\n");
++
++ ret = -ENOENT;
++ goto probe_disable_clk;
++ }
++
+ ret = mmc_add_host(mmc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to add mmc host.\n");
+- goto probe_disable_clk;
++ goto probe_free_irq_cd;
+ }
+
+ platform_set_drvdata(pdev, mmc);
+@@ -1292,15 +1292,15 @@ static int s3cmci_probe(struct platform_device *pdev, int is2440)
+ dev_info(&pdev->dev, "initialisation done.\n");
+ return 0;
+
++ probe_free_irq_cd:
++ free_irq(host->irq_cd, host);
++
+ probe_disable_clk:
+ clk_disable(host->clk);
+
+ probe_free_clk:
+ clk_put(host->clk);
+
+- probe_free_irq_cd:
+- free_irq(host->irq_cd, host);
+-
+ probe_free_dma:
+ s3c2410_dma_free(host->dma, &s3cmci_dma_client);
+
+@@ -1325,10 +1325,10 @@ static int s3cmci_remove(struct platform_device *pdev)
+ struct s3cmci_host *host = mmc_priv(mmc);
+
+ mmc_remove_host(mmc);
++ free_irq(host->irq_cd, host);
+ clk_disable(host->clk);
+ clk_put(host->clk);
+ s3c2410_dma_free(host->dma, &s3cmci_dma_client);
+- free_irq(host->irq_cd, host);
+ free_irq(host->irq, host);
+ iounmap(host->base);
+ release_mem_region(host->mem->start, RESSIZE(host->mem));
+--
+1.5.6.3
+