Date: Thu, 31 Aug 2017 10:59:39 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r323047 - head/sys/dev/ntb Message-ID: <201708311059.v7VAxdWX071994@repo.freebsd.org>
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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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