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Make ntb_transport(4) ready receive early link events.

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Those events may be reported as soon as callback is registered, if the link
is enabled by hardware or some other application.

While there, clean link_is_up variable on link down event.

MFC after:	1 week
This commit is contained in:
mav 2017-08-31 10:53:10 +00:00
parent 93ec89c358
commit 3882782295
1 changed files with 4 additions and 4 deletions
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8
sys/dev/ntb/ntb_transport.c
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@ -442,12 +442,12 @@ ntb_transport_attach(device_t dev)
callout_init(&nt->link_work, 0);
callout_init(&nt->link_watchdog, 0);
TASK_INIT(&nt->link_cleanup, 0, ntb_transport_link_cleanup_work, nt);
nt->link_is_up = false;
rc = ntb_set_ctx(dev, nt, &ntb_transport_ops);
if (rc != 0)
goto err;
nt->link_is_up = false;
ntb_link_enable(dev, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
if (enable_xeon_watchdog != 0)
@ -1279,6 +1279,9 @@ ntb_transport_link_cleanup(struct ntb_transport_ctx *nt)
struct ntb_transport_qp *qp;
int i;
callout_drain(&nt->link_work);
nt->link_is_up = 0;
/* Pass along the info to any clients */
for (i = 0; i < nt->qp_count; i++) {
if ((nt->qp_bitmap & (1 << i)) != 0) {
@ -1288,9 +1291,6 @@ ntb_transport_link_cleanup(struct ntb_transport_ctx *nt)
}
}
if (!nt->link_is_up)
callout_drain(&nt->link_work);
/*
* The scratchpad registers keep the values if the remote side
* goes down, blast them now to give them a sane value the next