tree be68b99784607953fb50d9330d34c2728215be57
parent c9c64155f5a81b4b41e98f9fb9c464a565c1bf72
author Alan Cox <alan@redhat.com> 1184567983 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184601941 -0700

Prevent an O_NDELAY writer from blocking when a tty write is blocked by the tty atomic writer mutex

Without this a tty write could block if a previous blocking tty write was
in progress on the same tty and blocked by a line discipline or hardware
event.  Originally found and reported by Dave Johnson.

Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Dave Johnson <djohnson+linux-kernel@sw.starentnetworks.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>