linux-kernel - [PATCH v2 0/7] More n

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Date:	Sat,  9 Jan 2016 21:45:07 -0800
From:	Peter Hurley <peter@...leysoftware.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH v2 0/7] More n_tty fixes

Changes from v2:
	added patch 7 from Johannes Stezenbach which fixes the
	TTY_DO_WRITE_WAKEUP logic to prevent missed SIGIO and reduce
	excessive SIGIO

original message follows:

Hi Greg,

This series collects up several fixes for N_TTY.

The first patch fixes read() when VMIN > 0 & VTIME = 0 (so called "record mode").
By ripping out a marginal optimization, the overall code is greatly simplified
and "record mode" read()s won't hang :)

Patch 2 removes the pointless fasync() notification to line disciplines.
Patches 3,4 & 5 fix hangup races with enabling/disabling signal-driven i/o.
Patch 6 is a minor cleanup for a condition test that can never be true.

Peter Hurley (7):
  n_tty: Always wake up read()/poll() if new input
  tty, n_tty: Remove fasync() ldisc notification
  tty: Add fasync() hung up file operation
  tty: Fix ioctl(FIOASYNC) on hungup file
  n_tty: Fix stuck write wakeup
  n_tty: Remove tty count checks from unthrottle
  tty: n_tty: fix SIGIO for output

 drivers/tty/n_tty.c       | 49 +++++------------------------------------------
 drivers/tty/tty_io.c      | 19 +++++++++---------
 include/linux/tty_ldisc.h |  6 ------
 3 files changed, 14 insertions(+), 60 deletions(-)

-- 
2.7.0