Hey Bill, I see that you are the author of the i2c-ismt driver so thought will check with you on a issue that I have been seeing on my setup.
My setup has an Intel Atom S1220 Processor which has a PMBUS device on its SMBUS 2.0 controller (SMBus—Bus 0:D19:F0-1). Now while accessing(read/write) the PMBUS device, I see the following error messages: [10799.333083] ismt_smbus 0000:00:13.1: completion wait timed out [10800.337089] ismt_smbus 0000:00:13.1: completion wait timed out [10801.341097] ismt_smbus 0000:00:13.1: completion wait timed out [10802.345105] ismt_smbus 0000:00:13.1: completion wait timed out All read/write access to the device fail when its in this state. The issue is hard to reproduce and happens once in a while. I tried rmmod/modprobe the driver, but that doesn't help. I dumped the relevant registers that are dev_dbg'ed in the driver and compared the data between the failed and working cases and I don't see any difference. Once in a while when I am in the failed state, I see the In Progress Bit (Bit 0) in the MSTS (Master Status Register) being set but its not always the case. Have you seen this issue before ? Any pointers on how to debug this ? Appreciate any help. Thanks Puneet-- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
