Messages in this thread | | | Date | Sun, 13 Jul 2014 17:13:43 +0200 | From | Jean Delvare <> | Subject | Re: [PATCH v2] i2c: stub: Add support for SMBus block commands |
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On Sun, 13 Jul 2014 08:04:54 -0700, Guenter Roeck wrote: > 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.
This is smart, I like it :)
> > 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.
Let's start simple and just implement what you need.
-- Jean Delvare SUSE L3 Support
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