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i2c: Fix NULL pointer dereference in i2c_new_probed_device

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Fix a NULL pointer dereference that happened when calling
i2c_new_probed_device on one of the addresses for which we use byte
reads instead of quick write for detection purpose (that is: 0x30-0x37
and 0x50-0x5f).

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Hans Verkuil 2008-08-10 22:56:15 +02:00 committed by Jean Delvare
parent 399d6b2653
commit b25b791b13
1 changed files with 3 additions and 1 deletions
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4
drivers/i2c/i2c-core.c
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@ -1451,9 +1451,11 @@ i2c_new_probed_device(struct i2c_adapter *adap,
if ((addr_list[i] & ~0x07) == 0x30
|| (addr_list[i] & ~0x0f) == 0x50
|| !i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK)) {
union i2c_smbus_data data;
if (i2c_smbus_xfer(adap, addr_list[i], 0,
I2C_SMBUS_READ, 0,
I2C_SMBUS_BYTE, NULL) >= 0)
I2C_SMBUS_BYTE, &data) >= 0)
break;
} else {
if (i2c_smbus_xfer(adap, addr_list[i], 0,