Messages in this thread | | | Date | Sun, 13 Jul 2014 08:04:54 -0700 | From | Guenter Roeck <> | Subject | Re: [PATCH v2] i2c: stub: Add support for SMBus block commands |
| |
On 07/13/2014 12:21 AM, Jean Delvare wrote: > Hi Guenter, > > On Sat, 12 Jul 2014 08:05:49 -0700, Guenter Roeck wrote: >> Any idea how we could inject errors ? Error path testing would be quite useful. > > Good idea. This should probably be done with a sysfs attribute so that > it can be turned on and off as desired. Off by default, of course. Some > other subsystems already support error injection, you could check how > they are doing it, do that we do not diverge needlessly. > > Do you think there is any value in failing with different error codes, > or just -EIO is enough? > How about writing the error code to return into the attribute ? Write anything negative, and it is returned as error. Write 0, and the driver works as normal.
> Do you think it should fail all the time when error injection is > enabled, or is there a value in having only a certain % of commands > fail? > For my purposes I would want it to fail reliably. We could add some fanciness, though: Provide a second attribute which specifies how many operations should pass before the first failure.
Thanks, Guenter
| |