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Linus Torvalds 55db4c64ed Revert "tty: make receive_buf() return the amout of bytes received" ... This reverts commit b1c43f82c5. It was broken in so many ways, and results in random odd pty issues. It re-introduced the buggy schedule_work() in flush_to_ldisc() that can cause endless work-loops (see commit a5660b41af6a: "tty: fix endless work loop when the buffer fills up"). It also used an "unsigned int" return value fo the ->receive_buf() function, but then made multiple functions return a negative error code, and didn't actually check for the error in the caller. And it didn't actually work at all. BenH bisected down odd tty behavior to it: "It looks like the patch is causing some major malfunctions of the X server for me, possibly related to PTYs. For example, cat'ing a large file in a gnome terminal hangs the kernel for -minutes- in a loop of what looks like flush_to_ldisc/workqueue code, (some ftrace data in the quoted bits further down). ... Some more data: It -looks- like what happens is that the flush_to_ldisc work queue entry constantly re-queues itself (because the PTY is full ?) and the workqueue thread will basically loop forver calling it without ever scheduling, thus starving the consumer process that could have emptied the PTY." which is pretty much exactly the problem we fixed in a5660b41af. Milton Miller pointed out the 'unsigned int' issue. Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Reported-by: Milton Miller <miltonm@bga.com> Cc: Stefan Bigler <stefan.bigler@keymile.com> Cc: Toby Gray <toby.gray@realvnc.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		14 years ago
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gameport	…
joystick	Fix common misspellings	14 years ago
keyboard	input: Add Qualcomm pm8xxx keypad controller driver	14 years ago
misc	input: Add support for Qualcomm PMIC8XXX power key	14 years ago
mouse	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	14 years ago
serio	Revert "tty: make receive_buf() return the amout of bytes received"	14 years ago
tablet	Input: wacom - add support for Lenovo tablet ID (0xE6)	14 years ago
touchscreen	Merge branch 'next' into for-linus	14 years ago
Kconfig	…
Makefile	…
apm-power.c	…
evbug.c	…
evdev.c	Input: remove useless synchronize_rcu() calls	14 years ago
ff-core.c	…
ff-memless.c	…
fixp-arith.h	…
input-compat.c	…
input-compat.h	arch/tile: finish enabling support for TILE-Gx 64-bit chip	14 years ago
input-mt.c	…
input-polldev.c	Input: input-polldev - use system-wide freezable workqueue	14 years ago
input.c	Input: remove useless synchronize_rcu() calls	14 years ago
joydev.c	Input: remove useless synchronize_rcu() calls	14 years ago
mousedev.c	Input: remove useless synchronize_rcu() calls	14 years ago
sparse-keymap.c	Input: sparse-keymap - report KEY_UNKNOWN for unknown scan codes	14 years ago