[Bug 229552] src/sys/net/if_me.c:522]: (style) Suspicious condition

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229552

            Bug ID: 229552
           Summary: src/sys/net/if_me.c:522]: (style) Suspicious condition
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: dcb314 at hotmail.com

src/sys/net/if_me.c:522]: (style) Suspicious condition (assignment +
comparison); Clarify expression with parentheses.

Source code is

       if (sc == NULL || !ME_READY(sc) ||
            (ifp->if_flags & IFF_MONITOR) != 0 ||
            (ifp->if_flags & IFF_UP) == 0 ||
            (error = me_check_nesting(ifp, m) != 0)) {

maybe better code

       if (sc == NULL || !ME_READY(sc) ||
            (ifp->if_flags & IFF_MONITOR) != 0 ||
            (ifp->if_flags & IFF_UP) == 0 ||
            (error = me_check_nesting(ifp, m)) != 0) {

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