The gpiommc configfs context structure needs locking, as configfs
does not lock access between files.
-Index: linux-2.6.25.10/drivers/mmc/host/gpiommc.c
-===================================================================
---- linux-2.6.25.10.orig/drivers/mmc/host/gpiommc.c 2008-07-21 11:57:01.000000000 +0200
-+++ linux-2.6.25.10/drivers/mmc/host/gpiommc.c 2008-07-21 12:01:33.000000000 +0200
-@@ -143,6 +143,8 @@ struct gpiommc_configfs_device {
+--- a/drivers/mmc/host/gpiommc.c
++++ b/drivers/mmc/host/gpiommc.c
+@@ -140,6 +140,8 @@ struct gpiommc_configfs_device {
struct platform_device *pdev;
/* The configuration */
struct gpiommc_platform_data pdata;
};
#define GPIO_INVALID -1
-@@ -233,6 +235,8 @@ static ssize_t gpiommc_config_attr_show(
+@@ -230,6 +232,8 @@ static ssize_t gpiommc_config_attr_show(
unsigned int gpio;
int err = 0;
if (attr == &gpiommc_attr_DI) {
gpio = dev->pdata.pins.gpio_di;
if (gpio == GPIO_INVALID)
-@@ -293,6 +297,8 @@ static ssize_t gpiommc_config_attr_show(
+@@ -290,6 +294,8 @@ static ssize_t gpiommc_config_attr_show(
WARN_ON(1);
err = -ENOSYS;
out:
return err ? err : count;
}
-@@ -352,6 +358,8 @@ static ssize_t gpiommc_config_attr_store
+@@ -349,6 +355,8 @@ static ssize_t gpiommc_config_attr_store
int err = -EINVAL;
unsigned long data;
if (attr == &gpiommc_attr_register) {
err = strict_strtoul(page, 10, &data);
if (err)
-@@ -477,6 +485,8 @@ static ssize_t gpiommc_config_attr_store
+@@ -474,6 +482,8 @@ static ssize_t gpiommc_config_attr_store
WARN_ON(1);
err = -ENOSYS;
out:
return err ? err : count;
}
-@@ -513,6 +523,7 @@ static struct config_item *gpiommc_make_
+@@ -510,6 +520,7 @@ static struct config_item *gpiommc_make_
if (!dev)
return NULL;