[Bug 195518] New: igb compilation failed if RSS is defined.

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sun Nov 30 05:14:21 UTC 2014


            Bug ID: 195518
           Summary: igb compilation failed if RSS is defined.
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: ki at hh.iij4u.or.jp

After r275136, kernel compilation failed with RSS option.

/usr/src/sys/dev/e1000/if_igb.c:2883:6: error: variable 'queues' is
      uninitialized when used here [-Werror,-Wuninitialized]
        if (queues > rss_getnumbuckets())
/usr/src/sys/dev/e1000/if_igb.c:2839:24: note: initialize the variable 'queues'
      to silence this warning
        int             bar, want, queues, msgs, maxqueues;
                                          = 0

In igb_setup_msix(), if RSS is defined, 'queues' is used before substituted.

2881    #ifdef  RSS
2882            /* If we're doing RSS, clamp at the number of RSS buckets */
2883            if (queues > rss_getnumbuckets())
2884                    queues = rss_getnumbuckets();
2885    #endif
2887            if (n_queues != 0) {
2888                    queues = n_queues;

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