From d5b27167e17e0d9393d6364703cc68e7f018023c Mon Sep 17 00:00:00 2001 From: Kusanagi Kouichi Date: Tue, 26 Apr 2011 19:19:26 +0900 Subject: char: Allow devices to use a single multiplexed chardev. This fixes regression caused by commit 2d6c1ef40f3678ab47a4d14fb5dadaa486bfcda6 ("char: Prevent multiple devices opening same chardev"): -nodefaults -nographic -chardev stdio,id=stdio,mux=on,signal=off \ -mon stdio -device virtio-serial-pci \ -device virtconsole,chardev=stdio -device isa-serial,chardev=stdio fails with: qemu-system-x86_64: -device isa-serial,chardev=stdio: Property 'isa-serial.chardev' can't take value 'stdio', it's in use Signed-off-by: Kusanagi Kouichi Signed-off-by: Amit Shah --- hw/qdev-properties.c | 4 ++-- qemu-char.c | 5 ++++- qemu-char.h | 2 +- 3 files changed, 7 insertions(+), 4 deletions(-) diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c index 1088a26f8..eff2d2494 100644 --- a/hw/qdev-properties.c +++ b/hw/qdev-properties.c @@ -354,10 +354,10 @@ static int parse_chr(DeviceState *dev, Property *prop, const char *str) if (*ptr == NULL) { return -ENOENT; } - if ((*ptr)->assigned) { + if ((*ptr)->avail_connections < 1) { return -EEXIST; } - (*ptr)->assigned = 1; + --(*ptr)->avail_connections; return 0; } diff --git a/qemu-char.c b/qemu-char.c index 710d98ffc..eaf6571ac 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -199,7 +199,7 @@ void qemu_chr_add_handlers(CharDriverState *s, { if (!opaque) { /* chr driver being released. */ - s->assigned = 0; + ++s->avail_connections; } s->chr_can_read = fd_can_read; s->chr_read = fd_read; @@ -2547,7 +2547,10 @@ CharDriverState *qemu_chr_open_opts(QemuOpts *opts, snprintf(base->label, len, "%s-base", qemu_opts_id(opts)); chr = qemu_chr_open_mux(base); chr->filename = base->filename; + chr->avail_connections = MAX_MUX; QTAILQ_INSERT_TAIL(&chardevs, chr, next); + } else { + chr->avail_connections = 1; } chr->label = qemu_strdup(qemu_opts_id(opts)); return chr; diff --git a/qemu-char.h b/qemu-char.h index 2f8512e52..892c6da9a 100644 --- a/qemu-char.h +++ b/qemu-char.h @@ -72,7 +72,7 @@ struct CharDriverState { char *label; char *filename; int opened; - int assigned; /* chardev assigned to a device */ + int avail_connections; QTAILQ_ENTRY(CharDriverState) next; }; -- cgit v1.2.3