diff options
Diffstat (limited to 'sys/dev/sio/sio.c')
| -rw-r--r-- | sys/dev/sio/sio.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c index de38f2fdfbca..d98ef8965a8d 100644 --- a/sys/dev/sio/sio.c +++ b/sys/dev/sio/sio.c @@ -1233,6 +1233,7 @@ open_top: * XXX we should goto open_top if comparam() slept. */ if (com->hasfifo) { + int i; /* * (Re)enable and drain fifos. * @@ -1244,7 +1245,7 @@ open_top: * and to handle races between enabling and fresh * input. */ - while (TRUE) { + for (i = 0; i < 500; i++) { sio_setreg(com, com_fifo, FIFO_RCV_RST | FIFO_XMT_RST | com->fifo_image); @@ -1266,6 +1267,10 @@ open_top: DELAY(50); (void) inb(com->data_port); } + if (i == 500) { + error = EIO; + goto out; + } } mtx_lock_spin(&sio_lock); |