Puneet Shenoy <puneet@...> writes: > > 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 majordomo@... > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Puneet, Did you get anything on this? Even i am also facing same error with smbus controller 2. ��.n��������+%������w��{.n�����{��-��)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
