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author | Rafał Miłecki <zajec5@gmail.com> | 2014-10-27 18:14:39 +0000 |
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committer | Rafał Miłecki <zajec5@gmail.com> | 2014-10-27 18:14:39 +0000 |
commit | 1513b39a8c8e21e3f8fbebab9fb4c41040ccf695 (patch) | |
tree | 7c786effff410b4a96d29c920d60cd279236fbf7 /target/linux/generic/patches-3.18/864-gpiommc_configfs_locking.patch | |
parent | 38e72c779e229933625d96d4355a0250123b6ce5 (diff) | |
download | mtk-20170518-1513b39a8c8e21e3f8fbebab9fb4c41040ccf695.zip mtk-20170518-1513b39a8c8e21e3f8fbebab9fb4c41040ccf695.tar.gz mtk-20170518-1513b39a8c8e21e3f8fbebab9fb4c41040ccf695.tar.bz2 |
kernel: start working on 3.18 support
This commit:
1) Copies 3.14 patches
2) Drops mainlined stuff
3) Modifies some patches to apply
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 43093
Diffstat (limited to 'target/linux/generic/patches-3.18/864-gpiommc_configfs_locking.patch')
-rw-r--r-- | target/linux/generic/patches-3.18/864-gpiommc_configfs_locking.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/864-gpiommc_configfs_locking.patch b/target/linux/generic/patches-3.18/864-gpiommc_configfs_locking.patch new file mode 100644 index 0000000..92815d9 --- /dev/null +++ b/target/linux/generic/patches-3.18/864-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); + |