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author | Thomas Kavanagh <tkavanagh@juniper.net> | 2012-09-20 20:20:46 -0700 |
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committer | Wolfram Sang <w.sang@pengutronix.de> | 2012-10-06 13:14:36 +0200 |
commit | a76e7c6821b5dddf69db9d76ec282819545f5b73 (patch) | |
tree | b86ced7ed1c3187cf1757e0f4b5acd68b423d8a4 /include | |
parent | 0c25aefa35c2fb5592895615f77d9f6fa36a849d (diff) | |
download | linux-stable-a76e7c6821b5dddf69db9d76ec282819545f5b73.tar.gz linux-stable-a76e7c6821b5dddf69db9d76ec282819545f5b73.tar.bz2 linux-stable-a76e7c6821b5dddf69db9d76ec282819545f5b73.zip |
i2c: algo: pca: Fix chip reset function for PCA9665
The parameter passed to pca9665_reset is adap->data (which is bus driver
specific), not i2c_algp_pca_data *adap. pca9665_reset expects it to be
i2c_algp_pca_data *adap. All other wrappers from the algo call back to
the bus driver, which knows to handle its custom data. Only pca9665_reset
resides inside the algorithm code and does not know how to handle a custom
data structure. This can result in a kernel crash.
Fix by re-factoring pca_reset() from a macro to a function handling chip
specific code, and only call adap->reset_chip() if the chip is not PCA9665.
Signed-off-by: Thomas Kavanagh <tkavanagh@juniper.net>
Signed-off-by: Guenter Roeck <groeck@juniper.net>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/i2c-algo-pca.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/i2c-algo-pca.h b/include/linux/i2c-algo-pca.h index 1364d62e2fbe..a3c3ecd59f08 100644 --- a/include/linux/i2c-algo-pca.h +++ b/include/linux/i2c-algo-pca.h @@ -62,6 +62,7 @@ struct i2c_algo_pca_data { * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000 * For PCA9665, use the frequency you want here. */ unsigned int i2c_clock; + unsigned int chip; }; int i2c_pca_add_bus(struct i2c_adapter *); |