diff options
| author | Amit Shah <amit.shah@redhat.com> | 2010-05-19 22:15:47 -0600 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2010-05-19 22:15:47 +0930 |
| commit | eaeff9608a8cf43a676b6f4b6235ea9d76192230 (patch) | |
| tree | 256259307b5ea4d2985d998896b10b1194182aa6 | |
| parent | 3425e706bf6faa2965c4e99f39085f7367a8f4e2 (diff) | |
virtio: console: Let host know of port or device add failures
The host may want to know and let management apps notify of port or
device add failures. Send a control message saying the device or port is
not ready in this case.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| -rw-r--r-- | drivers/char/virtio_console.c | 5 | ||||
| -rw-r--r-- | include/linux/virtio_console.h | 3 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 8c24b86aadc..f63bf77a482 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1210,6 +1210,8 @@ free_cdev: free_port: kfree(port); fail: + /* The host might want to notify management sw about port add failure */ + send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 0); return err; } @@ -1488,6 +1490,9 @@ free_chrdev: free: kfree(portdev); fail: + /* The host might want to notify mgmt sw about device add failure */ + __send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID, + VIRTIO_CONSOLE_DEVICE_READY, 0); return err; } diff --git a/include/linux/virtio_console.h b/include/linux/virtio_console.h index ae4f039515b..015736113c2 100644 --- a/include/linux/virtio_console.h +++ b/include/linux/virtio_console.h @@ -14,6 +14,8 @@ #define VIRTIO_CONSOLE_F_SIZE 0 /* Does host provide console size? */ #define VIRTIO_CONSOLE_F_MULTIPORT 1 /* Does host provide multiple ports? */ +#define VIRTIO_CONSOLE_BAD_ID (~(u32)0) + struct virtio_console_config { /* colums of the screens */ __u16 cols; @@ -42,6 +44,7 @@ struct virtio_console_control { #define VIRTIO_CONSOLE_PORT_OPEN 3 #define VIRTIO_CONSOLE_PORT_NAME 4 #define VIRTIO_CONSOLE_PORT_REMOVE 5 +#define VIRTIO_CONSOLE_DEVICE_READY 6 #ifdef __KERNEL__ int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int)); |