diff options
author | Markus Armbruster <armbru@redhat.com> | 2015-03-25 09:29:20 +0100 |
---|---|---|
committer | Markus Armbruster <armbru@redhat.com> | 2015-04-02 15:30:28 +0200 |
commit | d71b22bb6ae281e66dfa17733105468f830a8c6a (patch) | |
tree | 03c9ce46a81f9e8551d0466cf423476b83576e3e /hw/char/lm32_juart.c | |
parent | af9e40aa8f36e30e89f16323b3d341ee59309b7e (diff) |
hw: Mark devices picking up char backends actively FIXME
Character devices defined with -serial and -parallel are for board
initialization to wire up. Board code examines serial_hds[] and
parallel_hds[] to find them, and creates devices with their qdev
chardev properties set accordingly.
Except a few devices go on a fishing expedition for a suitable backend
instead of exposing a chardev property for board code to set: they use
serial_hds[] (often via qemu_char_get_next_serial()) or parallel_hds[]
in their realize() or init() method to connect to a backend.
Picking up backends that way works when the devices are created by
board code. But it's inappropriate for -device or device_add. Not
only is it inconsistent with how the other characrer device models
work (they connect to a backend explicitly identified by a "chardev"
property), it breaks when the backend has been picked up by the board
or a previous -device / device_add already.
Example:
$ qemu-system-ppc64 -M bamboo -S -device i82378 -device pc87312 -device pc87312
qemu-system-ppc64: -device pc87312: Property 'isa-parallel.chardev' can't take value 'parallel0', it's in use
Mark them with suitable FIXME comments.
Cc: Li Guang <lig.fnst@cn.fujitsu.com>
Cc: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Cc: Antony Pavlov <antonynpavlov@gmail.com>
Cc: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
Cc: Michael Walle <michael@walle.cc>
Cc: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Cc: "Andreas Färber" <andreas.faerber@web.de>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'hw/char/lm32_juart.c')
-rw-r--r-- | hw/char/lm32_juart.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/char/lm32_juart.c b/hw/char/lm32_juart.c index 628a86fc06..03285da00b 100644 --- a/hw/char/lm32_juart.c +++ b/hw/char/lm32_juart.c @@ -117,6 +117,7 @@ static int lm32_juart_init(SysBusDevice *dev) { LM32JuartState *s = LM32_JUART(dev); + /* FIXME use a qdev chardev prop instead of qemu_char_get_next_serial() */ s->chr = qemu_char_get_next_serial(); if (s->chr) { qemu_chr_add_handlers(s->chr, juart_can_rx, juart_rx, juart_event, s); |