Author: arybchik Date: Wed Dec 26 10:28:03 2018 New Revision: 342521 URL: https://svnweb.freebsd.org/changeset/base/342521
Log: MFC r341326 sfxge(4): ensure EvQ poll stops when abort is requested If an event handler requested an abort, only the inner loop was guarenteed to be broken out of - the outer loop could continue if total == batch. Fix this by poisoning batch to ensure it is different to total. Submitted by: Mark Spender <mspender at solarflare.com> Sponsored by: Solarflare Communications, Inc. Differential Revision: https://reviews.freebsd.org/D18287 Modified: stable/10/sys/dev/sfxge/common/efx_ev.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/sfxge/common/efx_ev.c ============================================================================== --- stable/10/sys/dev/sfxge/common/efx_ev.c Wed Dec 26 10:27:24 2018 (r342520) +++ stable/10/sys/dev/sfxge/common/efx_ev.c Wed Dec 26 10:28:03 2018 (r342521) @@ -501,6 +501,14 @@ efx_ev_qpoll( if (should_abort) { /* Ignore subsequent events */ total = index + 1; + + /* + * Poison batch to ensure the outer + * loop is broken out of. + */ + EFSYS_ASSERT(batch <= EFX_EV_BATCH); + batch += (EFX_EV_BATCH << 1); + EFSYS_ASSERT(total != batch); break; } } _______________________________________________ svn-src-stable-10@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-stable-10 To unsubscribe, send any mail to "svn-src-stable-10-unsubscr...@freebsd.org"
