Re: [PATCH v2] firmware: fix sending -ERESTARTSYS due to signal on fallback

[Luis R. Rodriguez]

On Wed, Jun 07, 2017 at 01:25:51PM +0100, Alan Cox wrote:
> > What's wrong with saying that the only way to interrupt firmware
> > loading is to kill the process? So ctrl-c will no longer interrupt
> > it, but I do not think that ease of aborting firmware update is
> > primary goal here. I consider simple is good here.
> 
> Agreed 100%. The user process did not ask for firmware load, it asked
> for an I/O operation. Semantically it should appear as if someone else
> did the firmware load and it just had to wait for it to happen.

Fine by me ! Will wrap up the patch for the new killable swait then.
I suppose noting it as a stable fix is worth it given the known issues
with for example Android killing loaders unexpectedly.

Unless I hear otherwise I'll also provide a follow up to return -EINTR instead
of -EAGAIN if swait returned -ERESTARTSYS, this way at least userspace could
tell a signal was definitely received. I *don't* think that follow up is
required for stable though.

  Luis