Date: Mon, 22 Mar 2010 20:12:10 +0000 (UTC) From: Jung-uk Kim <jkim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r205464 - stable/7/sys/net Message-ID: <201003222012.o2MKCA5H027542@svn.freebsd.org>
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Author: jkim Date: Mon Mar 22 20:12:10 2010 New Revision: 205464 URL: http://svn.freebsd.org/changeset/base/205464 Log: MFC: r205092 Tidy up callout for select(2) and read timeout. - Add a missing callout_drain(9) before the descriptor deallocation.[1] - Prefer callout_init_mtx(9) over callout_init(9) and let the callout subsystem handle the mutex for callout function. PR: kern/144453 Submitted by: Alexander Sack (asack at niksun dot com)[1] Modified: stable/7/sys/net/bpf.c Directory Properties: stable/7/sys/ (props changed) stable/7/sys/cddl/contrib/opensolaris/ (props changed) stable/7/sys/contrib/dev/acpica/ (props changed) stable/7/sys/contrib/pf/ (props changed) Modified: stable/7/sys/net/bpf.c ============================================================================== --- stable/7/sys/net/bpf.c Mon Mar 22 19:59:00 2010 (r205463) +++ stable/7/sys/net/bpf.c Mon Mar 22 20:12:10 2010 (r205464) @@ -424,7 +424,7 @@ bpfopen(struct cdev *dev, int flags, int mac_create_bpfdesc(td->td_ucred, d); #endif mtx_init(&d->bd_mtx, devtoname(dev), "bpf cdev lock", MTX_DEF); - callout_init(&d->bd_callout, CALLOUT_MPSAFE); + callout_init_mtx(&d->bd_callout, &d->bd_mtx, 0); knlist_init_mtx(&d->bd_sel.si_note, &d->bd_mtx); return (0); @@ -455,6 +455,7 @@ bpfclose(struct cdev *dev, int flags, in mac_destroy_bpfdesc(d); #endif /* MAC */ knlist_destroy(&d->bd_sel.si_note); + callout_drain(&d->bd_callout); bpf_freed(d); dev->si_drv1 = NULL; free(d, M_BPF); @@ -615,13 +616,15 @@ bpf_timed_out(void *arg) { struct bpf_d *d = (struct bpf_d *)arg; - BPFD_LOCK(d); + BPFD_LOCK_ASSERT(d); + + if (callout_pending(&d->bd_callout) || !callout_active(&d->bd_callout)) + return; if (d->bd_state == BPF_WAITING) { d->bd_state = BPF_TIMED_OUT; if (d->bd_slen != 0) bpf_wakeup(d); } - BPFD_UNLOCK(d); } static int
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