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authorJean Delvare <khali@linux-fr.org>2010-11-15 22:40:38 +0100
committerJean Delvare <khali@endymion.delvare>2010-11-15 22:40:38 +0100
commit2236baa75f704851d3cd3310569058151acb1f06 (patch)
treea34e5684bff7127a849c44de2a5b517811917d34 /drivers/i2c/i2c-core.c
parente1e18ee1cb58228a577668284c1dd03d859d7157 (diff)
downloadlinux-linaro-stable-2236baa75f704851d3cd3310569058151acb1f06.tar.gz
i2c: Sanity checks on adapter registration
Make sure I2C adapters being registered have the required struct fields set. If they don't, problems will happen later. Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/i2c-core.c')
-rw-r--r--drivers/i2c/i2c-core.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index d231f683f576..6b4cc567645b 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -848,6 +848,18 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
goto out_list;
}
+ /* Sanity checks */
+ if (unlikely(adap->name[0] == '\0')) {
+ pr_err("i2c-core: Attempt to register an adapter with "
+ "no name!\n");
+ return -EINVAL;
+ }
+ if (unlikely(!adap->algo)) {
+ pr_err("i2c-core: Attempt to register adapter '%s' with "
+ "no algo!\n", adap->name);
+ return -EINVAL;
+ }
+
rt_mutex_init(&adap->bus_lock);
mutex_init(&adap->userspace_clients_lock);
INIT_LIST_HEAD(&adap->userspace_clients);