Re: [PATCH 0/1] devpts: use dynamic_dname() to generate proc name

[Linus Torvalds]

On Thu, Aug 24, 2017 at 11:13 AM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> The attached patch should work. It's Eric's original patch with
> various cleanups and fixes.

No, one more bug in there: Eric did

+ case TIOCGPTPEER:
+        retval = ptm_open_peer(file, tty, (int)arg);
+        break;

to call that ptm_open_peer(), but that's bogus. The "break;" will just
cause it to continue with the tty ioctl handling, and result in
-ENOTTY in the end.

So it actually *did* open the slave, but then threw the returned fd value away.

It should just do a "return ptm_open_peer(file, tty, (int)arg);" instead.

                       Linus