Date: Fri, 22 Feb 2019 18:02:46 +0000 (UTC) From: Stephen Hurd <shurd@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r344471 - stable/12/sys/net Message-ID: <201902221802.x1MI2kmu024771@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: shurd Date: Fri Feb 22 18:02:46 2019 New Revision: 344471 URL: https://svnweb.freebsd.org/changeset/base/344471 Log: MFC r344162: iflib: Improve return values of interrupt handlers. iflib was returning FILTER_HANDLED, in cases where FILTER_STRAY was more correct. This potentially caused issues with shared legacy interrupts. Driver filters returning FILTER_STRAY are now properly handled. Submitted by: Augustin Cavalier <waddlesplash@gmail.com> Reviewed by: marius, gallatin Obtained from: Haiku (a84bb9, 4947d1) Sponsored by: Limelight Networks Differential Revision: https://reviews.freebsd.org/D19201 Modified: stable/12/sys/net/iflib.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/net/iflib.c ============================================================================== --- stable/12/sys/net/iflib.c Fri Feb 22 15:31:50 2019 (r344470) +++ stable/12/sys/net/iflib.c Fri Feb 22 18:02:46 2019 (r344471) @@ -1466,12 +1466,17 @@ iflib_fast_intr(void *arg) { iflib_filter_info_t info = arg; struct grouptask *gtask = info->ifi_task; + int result; + if (!iflib_started) - return (FILTER_HANDLED); + return (FILTER_STRAY); DBG_COUNTER_INC(fast_intrs); - if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED) - return (FILTER_HANDLED); + if (info->ifi_filter != NULL) { + result = info->ifi_filter(info->ifi_filter_arg); + if ((result & FILTER_SCHEDULE_THREAD) == 0) + return (result); + } GROUPTASK_ENQUEUE(gtask); return (FILTER_HANDLED); @@ -1484,14 +1489,17 @@ iflib_fast_intr_rxtx(void *arg) struct grouptask *gtask = info->ifi_task; iflib_rxq_t rxq = (iflib_rxq_t)info->ifi_ctx; if_ctx_t ctx = NULL;; - int i, cidx; + int i, cidx, result; if (!iflib_started) - return (FILTER_HANDLED); + return (FILTER_STRAY); DBG_COUNTER_INC(fast_intrs); - if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED) - return (FILTER_HANDLED); + if (info->ifi_filter != NULL) { + result = info->ifi_filter(info->ifi_filter_arg); + if ((result & FILTER_SCHEDULE_THREAD) == 0) + return (result); + } MPASS(rxq->ifr_ntxqirq); for (i = 0; i < rxq->ifr_ntxqirq; i++) { @@ -1526,13 +1534,17 @@ iflib_fast_intr_ctx(void *arg) { iflib_filter_info_t info = arg; struct grouptask *gtask = info->ifi_task; + int result; if (!iflib_started) - return (FILTER_HANDLED); + return (FILTER_STRAY); DBG_COUNTER_INC(fast_intrs); - if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED) - return (FILTER_HANDLED); + if (info->ifi_filter != NULL) { + result = info->ifi_filter(info->ifi_filter_arg); + if ((result & FILTER_SCHEDULE_THREAD) == 0) + return (result); + } GROUPTASK_ENQUEUE(gtask); return (FILTER_HANDLED);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201902221802.x1MI2kmu024771>