Date: Tue, 15 Nov 2011 17:42:00 +0000 (UTC) From: Xin LI <delphij@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r227534 - releng/9.0/sys/dev/mfi Message-ID: <201111151742.pAFHg0UF010337@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: delphij Date: Tue Nov 15 17:42:00 2011 New Revision: 227534 URL: http://svn.freebsd.org/changeset/base/227534 Log: MFC r227409: Do a dummy read to flush the interrupt ACK that we just performed, ensuring that everything is really, truly consistent. This fixes certain cases where one will see various: mfi0: COMMAND 0xffffffXXXXXXXXXX TIMEOUT AFTER XX SECONDS Submitted by: scottl Ok'ed by: jhb Approved by: re (kib) Modified: releng/9.0/sys/dev/mfi/mfi.c Directory Properties: releng/9.0/sys/ (props changed) Modified: releng/9.0/sys/dev/mfi/mfi.c ============================================================================== --- releng/9.0/sys/dev/mfi/mfi.c Tue Nov 15 17:30:03 2011 (r227533) +++ releng/9.0/sys/dev/mfi/mfi.c Tue Nov 15 17:42:00 2011 (r227534) @@ -932,6 +932,12 @@ mfi_intr(void *arg) if (sc->mfi_check_clear_intr(sc)) return; + /* + * Do a dummy read to flush the interrupt ACK that we just performed, + * ensuring that everything is really, truly consistent. + */ + (void)sc->mfi_read_fw_status(sc); + pi = sc->mfi_comms->hw_pi; ci = sc->mfi_comms->hw_ci; mtx_lock(&sc->mfi_io_lock);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201111151742.pAFHg0UF010337>