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| author | David S. Miller <davem@davemloft.net> | 2012-09-15 11:43:53 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-09-15 11:43:53 -0400 |
| commit | b48b63a1f6e26b0dec2c9f1690396ed4bcb66903 (patch) | |
| tree | 8d9ad227c3a7d35cd78d40ecaf9bf59375dbd21a /drivers/i2c/i2c-core.c | |
| parent | 7f2e6a5d8608d0353b017a0fe15502307593734e (diff) | |
| parent | 3f0c3c8fe30c725c1264fb6db8cc4b69db3a658a (diff) | |
| download | kernel_goldelico_gta04-b48b63a1f6e26b0dec2c9f1690396ed4bcb66903.zip kernel_goldelico_gta04-b48b63a1f6e26b0dec2c9f1690396ed4bcb66903.tar.gz kernel_goldelico_gta04-b48b63a1f6e26b0dec2c9f1690396ed4bcb66903.tar.bz2 | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
net/netfilter/nfnetlink_log.c
net/netfilter/xt_LOG.c
Rather easy conflict resolution, the 'net' tree had bug fixes to make
sure we checked if a socket is a time-wait one or not and elide the
logging code if so.
Whereas on the 'net-next' side we are calculating the UID and GID from
the creds using different interfaces due to the user namespace changes
from Eric Biederman.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/i2c/i2c-core.c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 2efa56c..2091ae8 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -637,6 +637,22 @@ static void i2c_adapter_dev_release(struct device *dev) } /* + * This function is only needed for mutex_lock_nested, so it is never + * called unless locking correctness checking is enabled. Thus we + * make it inline to avoid a compiler warning. That's what gcc ends up + * doing anyway. + */ +static inline unsigned int i2c_adapter_depth(struct i2c_adapter *adapter) +{ + unsigned int depth = 0; + + while ((adapter = i2c_parent_is_i2c_adapter(adapter))) + depth++; + + return depth; +} + +/* * Let users instantiate I2C devices through sysfs. This can be used when * platform initialization code doesn't contain the proper data for * whatever reason. Also useful for drivers that do device detection and @@ -726,7 +742,8 @@ i2c_sysfs_delete_device(struct device *dev, struct device_attribute *attr, /* Make sure the device was added through sysfs */ res = -ENOENT; - mutex_lock(&adap->userspace_clients_lock); + mutex_lock_nested(&adap->userspace_clients_lock, + i2c_adapter_depth(adap)); list_for_each_entry_safe(client, next, &adap->userspace_clients, detected) { if (client->addr == addr) { @@ -1073,7 +1090,8 @@ int i2c_del_adapter(struct i2c_adapter *adap) return res; /* Remove devices instantiated from sysfs */ - mutex_lock(&adap->userspace_clients_lock); + mutex_lock_nested(&adap->userspace_clients_lock, + i2c_adapter_depth(adap)); list_for_each_entry_safe(client, next, &adap->userspace_clients, detected) { dev_dbg(&adap->dev, "Removing %s at 0x%x\n", client->name, |