[Bug 232554] iprowifi2100: broken tx fix [patch]

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=232554

            Bug ID: 232554
           Summary: iprowifi2100: broken tx fix [patch]
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: gl00my at mail.ru

Created attachment 198486
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=198486&action=edit
iprowifi2100: fix the broken tx

This fix work of iprowifi2100 that was broken here: 

https://github.com/freebsd/freebsd/commit/619aca846fad0cf56fcd9c3374008f26a6f98b24

This condition (sc->txfree < 1 + IPW_MAX_NSEG) was never true. 

Original code used this for error case:

if (sc->txfree < 1 + IPW_MAX_NSEG) {
        IFQ_DRV_PREPEND(&ifp->if_snd, m);
        ifp->if_drv_flags |= IFF_DRV_OACTIVE;
        break;
}

Hope, it helps...

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