diff options
author | Imre Kaloz <kaloz@openwrt.org> | 2013-10-24 13:50:11 +0000 |
---|---|---|
committer | Imre Kaloz <kaloz@openwrt.org> | 2013-10-24 13:50:11 +0000 |
commit | e72c7e17a475c00134c56f4392578ddc16a47a2e (patch) | |
tree | 842835f958f9c9ed315cb853173d51e43f76bbf5 /target/linux/generic/patches-3.12/864-gpiommc_configfs_locking.patch | |
parent | 4341ea40379ed24c103e37b75661c62bfc3270f6 (diff) | |
download | mtk-20170518-e72c7e17a475c00134c56f4392578ddc16a47a2e.zip mtk-20170518-e72c7e17a475c00134c56f4392578ddc16a47a2e.tar.gz mtk-20170518-e72c7e17a475c00134c56f4392578ddc16a47a2e.tar.bz2 |
preliminary 3.12 support
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
SVN-Revision: 38528
Diffstat (limited to 'target/linux/generic/patches-3.12/864-gpiommc_configfs_locking.patch')
-rw-r--r-- | target/linux/generic/patches-3.12/864-gpiommc_configfs_locking.patch | 58 |
1 files changed, 58 insertions, 0 deletions
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 0000000..92815d9 --- /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); + |