diff options
Diffstat (limited to 'hw/lpc-mbox.c')
| -rw-r--r-- | hw/lpc-mbox.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/hw/lpc-mbox.c b/hw/lpc-mbox.c index 7a57f1e7..74214938 100644 --- a/hw/lpc-mbox.c +++ b/hw/lpc-mbox.c @@ -63,6 +63,7 @@ struct mbox { void *attn_data; struct lock lock; /* Protect in_flight */ struct bmc_mbox_msg *in_flight; + uint8_t sequence; }; static struct mbox mbox; @@ -130,6 +131,7 @@ int bmc_mbox_enqueue(struct bmc_mbox_msg *msg) mbox.in_flight = msg; unlock(&mbox.lock); + msg->seq = ++mbox.sequence; bmc_mbox_send_message(msg); @@ -162,7 +164,13 @@ static void mbox_poll(struct timer *t __unused, void *data __unused, prlog(PR_CRIT, "Couldn't find the message!!\n"); goto out_response; } + bmc_mbox_recv_message(msg); + if (mbox.sequence != msg->seq) { + prlog(PR_ERR, "Got a response to a message we no longer care about\n"); + goto out_response; + } + if (mbox.callback) mbox.callback(msg, mbox.drv_data); else @@ -330,6 +338,7 @@ void mbox_init(void) mbox.in_flight = NULL; mbox.callback = NULL; mbox.drv_data = NULL; + mbox.sequence = 0; init_lock(&mbox.lock); init_timer(&mbox.poller, mbox_poll, NULL); |
