Messages in this thread | | | Date | Tue, 27 Mar 2007 11:25:57 +0200 | From | "Kay Sievers" <> | Subject | Re: 2.6.21-rc4-mm1 |
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On 3/26/07, Eric Rannaud <eric.rannaud@gmail.com> wrote: > On Mon, Mar 26, 2007 at 01:22:32AM -0800, Andrew Morton wrote: > > On Mon, 26 Mar 2007 11:09:49 +0200 Cornelia Huck <cornelia.huck@de.ibm.com> wrote: > > > > If so, do you think I should labour on with > > > > uevent-improve-error-checking-and-handling.patch plus your fix, or should I > > > > drop the lot? (I'm inclined toward the latter, but I'm still not > > > > sure which patch(es) need to be dropped). > > > > > > This depends on what semantics uevent returning an error code should > > > have. The firmware code was using it to suppress uevents, but > > > uevent_suppress is a better idea now. So if we want uevent returning != > > > 0 to imply "something really bad happened", all uevent functions have > > > to be audited and those that work like firmware_uevent have to be > > > converted to uevent_suppress. This would be cleaner, but I'm not sure > > > it's worth the work. > > > > We're generally struggling to stay alive amongst all the bugs at present - > > I'll drop all those patches. > > My mistake, I wrote the guilty patch > uevent-improve-error-checking-and-handling.patch assuming it was safe to > treat the return value as an error code, since several uevent functions > returns things like -ENOMEM. > > Should I rework the patch as Cornelia suggests and resubmit later, when > things have settled down a little?
I don't see any point in deregistering a kernel device, if the event to userspace goes wrong, or a subsytem returns a non-zero value in the filter.
Checking the uevent return value, will not prevent any malfunction, usually this kind of "error handling" just prevents bringing up a whole subsystem, or booting-up a box, because the needed device does not exist at all.
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