i2c_smbus_xfer needs the structure i2c_smbus_data for write_byte with SW PEC.
However, NULL is passed from i2cdev_ioctl.
Currently
ioctl(fd,I2C_PEC,1);
i2c_smbus_write_byte(fd,value);
causes NULL pointer access in i2c_smbus_add_pec.
Index: kernel/i2c-dev.c
===================================================================
RCS file: /home/cvs/i2c/kernel/i2c-dev.c,v
retrieving revision 1.61
diff -u -r1.61 i2c-dev.c
--- kernel/i2c-dev.c 19 May 2005 20:50:29 -0000 1.61
+++ kernel/i2c-dev.c 25 Sep 2005 09:33:21 -0000
@@ -329,7 +329,8 @@
client->flags,
data_arg.read_write,
data_arg.command,
- data_arg.size, NULL);
+ data_arg.size,
+ (data_arg.size == I2C_SMBUS_QUICK) ? NULL : &temp);
if (data_arg.data == NULL) {
#ifdef DEBUG
----
Hideki IWAMOTO h-iwamoto at kit.hi-ho.ne.jp
