mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-19 19:05:54 +02:00
056768cd4b
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@13011 3c298f89-4303-0410-b956-a3cf2f4a3e73
61 lines
1.6 KiB
Diff
61 lines
1.6 KiB
Diff
The gpiommc configfs context structure needs locking, as configfs
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does not lock access between files.
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Index: linux-2.6.25.17/drivers/mmc/host/gpiommc.c
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===================================================================
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--- linux-2.6.25.17.orig/drivers/mmc/host/gpiommc.c 2008-10-18 23:33:54.000000000 +0200
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+++ linux-2.6.25.17/drivers/mmc/host/gpiommc.c 2008-10-18 23:34:33.000000000 +0200
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@@ -140,6 +140,8 @@ struct gpiommc_configfs_device {
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struct platform_device *pdev;
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/* The configuration */
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struct gpiommc_platform_data pdata;
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+ /* Mutex to protect this structure */
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+ struct mutex mutex;
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};
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#define GPIO_INVALID -1
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@@ -230,6 +232,8 @@ static ssize_t gpiommc_config_attr_show(
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unsigned int gpio;
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int err = 0;
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+ mutex_lock(&dev->mutex);
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+
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if (attr == &gpiommc_attr_DI) {
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gpio = dev->pdata.pins.gpio_di;
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if (gpio == GPIO_INVALID)
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@@ -290,6 +294,8 @@ static ssize_t gpiommc_config_attr_show(
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WARN_ON(1);
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err = -ENOSYS;
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out:
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+ mutex_unlock(&dev->mutex);
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+
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return err ? err : count;
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}
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@@ -349,6 +355,8 @@ static ssize_t gpiommc_config_attr_store
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int err = -EINVAL;
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unsigned long data;
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+ mutex_lock(&dev->mutex);
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+
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if (attr == &gpiommc_attr_register) {
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err = strict_strtoul(page, 10, &data);
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if (err)
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@@ -474,6 +482,8 @@ static ssize_t gpiommc_config_attr_store
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WARN_ON(1);
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err = -ENOSYS;
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out:
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+ mutex_unlock(&dev->mutex);
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+
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return err ? err : count;
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}
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@@ -510,6 +520,7 @@ static struct config_item *gpiommc_make_
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if (!dev)
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return NULL;
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+ mutex_init(&dev->mutex);
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config_item_init_type_name(&dev->item, name,
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&gpiommc_dev_ci_type);
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