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author | Jonas Gorski <jogo@openwrt.org> | 2012-02-02 08:23:54 +0000 |
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committer | Jonas Gorski <jogo@openwrt.org> | 2012-02-02 08:23:54 +0000 |
commit | eca9950f63ec4491a7bd6138174ac08595184e1b (patch) | |
tree | a21d36b4e93a079ce234258a3a82b97dd82c10bf /target/linux/generic/patches-3.3/864-gpiommc_configfs_locking.patch | |
parent | c336de3d85efb1a1150825870b7cbff4f7a65366 (diff) | |
download | mtk-20170518-eca9950f63ec4491a7bd6138174ac08595184e1b.zip mtk-20170518-eca9950f63ec4491a7bd6138174ac08595184e1b.tar.gz mtk-20170518-eca9950f63ec4491a7bd6138174ac08595184e1b.tar.bz2 |
kernel: add preliminary support for linux 3.3
Based on 3.3-rc2
SVN-Revision: 29986
Diffstat (limited to 'target/linux/generic/patches-3.3/864-gpiommc_configfs_locking.patch')
-rw-r--r-- | target/linux/generic/patches-3.3/864-gpiommc_configfs_locking.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.3/864-gpiommc_configfs_locking.patch b/target/linux/generic/patches-3.3/864-gpiommc_configfs_locking.patch new file mode 100644 index 0000000..d4201eb --- /dev/null +++ b/target/linux/generic/patches-3.3/864-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 = strict_strtoul(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); + |