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| author | Jean Delvare <jdelvare@suse.de> | 2013-10-10 08:04:06 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2013-10-10 10:22:31 +0200 |
| commit | 47b6e477ed4ecacddd1f82d04d686026e08dc3db (patch) | |
| tree | f9e03f3e28a24d9c4197d5483dd22585de74c583 | |
| parent | 6d2cfb109725b748f47a242f87be9c31bf7e42c0 (diff) | |
| download | lwn-47b6e477ed4ecacddd1f82d04d686026e08dc3db.tar.gz lwn-47b6e477ed4ecacddd1f82d04d686026e08dc3db.zip | |
i2c: Not all adapters have a parent
The code in acpi_i2c_register_devices() assumes that all i2c adapters
have a parent. This is not necessarily the case, for example the
i2c-stub driver instantiate a virtual i2c adapter without a parent.
Check for this to avoid a NULL pointer deference.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
| -rw-r--r-- | drivers/i2c/i2c-core.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 29d3f045a2bf..3be58f89ac77 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1134,6 +1134,9 @@ static void acpi_i2c_register_devices(struct i2c_adapter *adap) acpi_handle handle; acpi_status status; + if (!adap->dev.parent) + return; + handle = ACPI_HANDLE(adap->dev.parent); if (!handle) return; |