good diagnosis khali. the 6300ESB definitely supports i2c block so there must be a bug in there somewhere. I just reviewed the code and didn't see anything obvious. David can you recompile i2c-i801 with the DEBUG=1 uncommented and send us the dmesg output? Jean Delvare wrote: > Hi David, > > >>>What's the PCI ID of this one? Maybe block transfers work OK for the >>>E7501 but not for the E7520. >> >>The SMBus controller on the E7501 is 8086:2483 (rev 02). >>The SMBus controller on the E7520 is 8086:25a4 (rev 02). > > > OK, mystery explained then. 2483 is an ICH3, for which the I2C block > transfers are not available at all - so MDS' changes did not affect > this one. 25a4 is an 6300ESB, which is more recent and supposedly > supports I2C block transfers, thus is affected by the change. > > >>>(although I still can't get why lm93 doesn't trigger it). > > > As noted by Mark Hoffman, the lm93 driver uses SMBus block transfers, not > I2C block transfers. Second mystery explained. SMBus block transfers > were implemented longer ago and seem to work. > > So the conclusion is that the (untested as of now) I2C block transfer > recently added to the i2c-i801 driver by Mark Studebaker doesn't work > for you, and most presumably doesn't work at all. I will leave it to > Mark to propose a fix or debug tests to further analyze the problem. > > Thanks, > -- > Jean Delvare > >
