From 62a2176cb1446f865b58299f080493f26ce53573 Mon Sep 17 00:00:00 2001 From: kaloz Date: Thu, 24 Oct 2013 13:50:11 +0000 Subject: [generic:] preliminary 3.12 support Signed-off-by: Imre Kaloz git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38528 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../864-gpiommc_configfs_locking.patch | 58 ++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 target/linux/generic/patches-3.12/864-gpiommc_configfs_locking.patch (limited to 'target/linux/generic/patches-3.12/864-gpiommc_configfs_locking.patch') diff --git a/target/linux/generic/patches-3.12/864-gpiommc_configfs_locking.patch b/target/linux/generic/patches-3.12/864-gpiommc_configfs_locking.patch new file mode 100644 index 0000000000..92815d91f4 --- /dev/null +++ b/target/linux/generic/patches-3.12/864-gpiommc_configfs_locking.patch @@ -0,0 +1,58 @@ +The gpiommc configfs context structure needs locking, as configfs +does not lock access between files. + +--- a/drivers/mmc/host/gpiommc.c ++++ b/drivers/mmc/host/gpiommc.c +@@ -144,6 +144,8 @@ struct gpiommc_configfs_device { + struct platform_device *pdev; + /* The configuration */ + struct gpiommc_platform_data pdata; ++ /* Mutex to protect this structure */ ++ struct mutex mutex; + }; + + #define GPIO_INVALID -1 +@@ -234,6 +236,8 @@ static ssize_t gpiommc_config_attr_show( + unsigned int gpio; + int err = 0; + ++ mutex_lock(&dev->mutex); ++ + if (attr == &gpiommc_attr_DI) { + gpio = dev->pdata.pins.gpio_di; + if (gpio == GPIO_INVALID) +@@ -294,6 +298,8 @@ static ssize_t gpiommc_config_attr_show( + WARN_ON(1); + err = -ENOSYS; + out: ++ mutex_unlock(&dev->mutex); ++ + return err ? err : count; + } + +@@ -353,6 +359,8 @@ static ssize_t gpiommc_config_attr_store + int err = -EINVAL; + unsigned long data; + ++ mutex_lock(&dev->mutex); ++ + if (attr == &gpiommc_attr_register) { + err = kstrtoul(page, 10, &data); + if (err) +@@ -478,6 +486,8 @@ static ssize_t gpiommc_config_attr_store + WARN_ON(1); + err = -ENOSYS; + out: ++ mutex_unlock(&dev->mutex); ++ + return err ? err : count; + } + +@@ -514,6 +524,7 @@ static struct config_item *gpiommc_make_ + if (!dev) + return NULL; + ++ mutex_init(&dev->mutex); + config_item_init_type_name(&dev->item, name, + &gpiommc_dev_ci_type); + -- cgit v1.2.3