Hello David: * David Knierim <david_knierim at earthlink.net> [2004-09-21 07:58:37 -0700]: > The logs were pretty large, so we placed them on the web: > > http://lee.k12.nc.us/~joden/misc/sensors/ Thanks for doing that, and for saving some list B/W too. > dmesg_noblock - block data disabled > dmesg_withblock - block data enabled The i2c-i801 driver has *major* brain damage w.r.t. block xfers. What I *expected* to see in your logs was a timeout of some sort, indicating that the bus was not resetting properly after a xfer. Not even close: the bus driver is actually performing a whole block xfer once for each byte!!! Seeing this, I wouldn't be suprised to find out that you are the very first user of that function, ever. I am honestly amazed that it works at all. So I understand what needs to be done, but actually fixing it is not high on my list just now - especially since you have a workaround (disable_block=1). One reason this will take some time is that this driver supports several different chipsets. Apparently some of them have a block xfer buffer and some don't; I would have to read through ~5 chipset datasheets to sort it out. This is one reason I was hoping the original authors would get involved. Hopefully, I'll have some time to work on this after I finish some other stuff. Regards, -- Mark M. Hoffman mhoffman at lightlink.com
