Author: mav
Date: Thu Aug 31 10:59:39 2017
New Revision: 323047
URL: https://svnweb.freebsd.org/changeset/base/323047
Log:
Make ntb_set_ctx() always generate fake link event.
It allows application driver get initial link state without racing with
hardware interrupts, thanks to the context rmlock held here.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Modified:
head/sys/dev/ntb/ntb.c
Modified: head/sys/dev/ntb/ntb.c
==============================================================================
--- head/sys/dev/ntb/ntb.c Thu Aug 31 10:53:10 2017 (r323046)
+++ head/sys/dev/ntb/ntb.c Thu Aug 31 10:59:39 2017 (r323047)
@@ -264,6 +264,13 @@ ntb_set_ctx(device_t ntb, void *ctx, const struct ntb_
}
nc->ctx = ctx;
nc->ctx_ops = ctx_ops;
+
+ /*
+ * If applicaiton driver asks for link events, generate fake one now
+ * to let it update link state without races while we hold the lock.
+ */
+ if (ctx_ops->link_event != NULL)
+ ctx_ops->link_event(ctx);
rm_wunlock(&nc->ctx_lock);
return (0);
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