Date: Mon, 9 Jun 2014 01:39:48 +0000 (UTC) From: Navdeep Parhar <np@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r267247 - stable/9/sys/dev/cxgbe Message-ID: <201406090139.s591dmL1083743@svn.freebsd.org>
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Author: np Date: Mon Jun 9 01:39:47 2014 New Revision: 267247 URL: http://svnweb.freebsd.org/changeset/base/267247 Log: MFC r267082: cxgbe(4): Properly account for the freelist buffers used when returning early from service_iq due to a budget restriction. This fixes a potential rx hang when using INTx. Approved by: re@ (gjb) Modified: stable/9/sys/dev/cxgbe/t4_sge.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/dev/ (props changed) Modified: stable/9/sys/dev/cxgbe/t4_sge.c ============================================================================== --- stable/9/sys/dev/cxgbe/t4_sge.c Mon Jun 9 01:24:53 2014 (r267246) +++ stable/9/sys/dev/cxgbe/t4_sge.c Mon Jun 9 01:39:47 2014 (r267247) @@ -1334,8 +1334,15 @@ service_iq(struct sge_iq *iq, int budget V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX))); ndescs = 0; - if (budget) + if (budget) { + if (fl_bufs_used) { + FL_LOCK(fl); + fl->needed += fl_bufs_used; + refill_fl(sc, fl, 32); + FL_UNLOCK(fl); + } return (EINPROGRESS); + } } }
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