diff options
| -rw-r--r-- | hw/qdev-properties.c | 7 | ||||
| -rw-r--r-- | qemu-char.c | 4 | ||||
| -rw-r--r-- | qemu-char.h | 1 |
3 files changed, 11 insertions, 1 deletions
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c index a45b61e7ed..1088a26f8e 100644 --- a/hw/qdev-properties.c +++ b/hw/qdev-properties.c @@ -351,8 +351,13 @@ static int parse_chr(DeviceState *dev, Property *prop, const char *str) CharDriverState **ptr = qdev_get_prop_ptr(dev, prop); *ptr = qemu_chr_find(str); - if (*ptr == NULL) + if (*ptr == NULL) { return -ENOENT; + } + if ((*ptr)->assigned) { + return -EEXIST; + } + (*ptr)->assigned = 1; return 0; } diff --git a/qemu-char.c b/qemu-char.c index cad35d7717..c4557c30d0 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -197,6 +197,10 @@ void qemu_chr_add_handlers(CharDriverState *s, IOEventHandler *fd_event, void *opaque) { + if (!opaque) { + /* chr driver being released. */ + s->assigned = 0; + } s->chr_can_read = fd_can_read; s->chr_read = fd_read; s->chr_event = fd_event; diff --git a/qemu-char.h b/qemu-char.h index 56d9954c52..fb96eef3de 100644 --- a/qemu-char.h +++ b/qemu-char.h @@ -70,6 +70,7 @@ struct CharDriverState { char *label; char *filename; int opened; + int assigned; /* chardev assigned to a device */ QTAILQ_ENTRY(CharDriverState) next; }; |