From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932919Ab2EDUtg (ORCPT ); Fri, 4 May 2012 16:49:36 -0400 Received: from mail-pz0-f45.google.com ([209.85.210.45]:61380 "EHLO mail-pz0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759967Ab2EDUtb (ORCPT ); Fri, 4 May 2012 16:49:31 -0400 Message-Id: <20120504204247.544433554@linuxfoundation.org> User-Agent: quilt/0.60-19.1 Date: Fri, 04 May 2012 13:43:15 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Thomas Jackson , Dan Williams , James Bottomley Subject: [ 31/47] SCSI: libsas: fix sas_find_bcast_phy() in the presence of vacant phys In-Reply-To: <20120504204307.GA13761@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Jackson commit 1699490db339e2c6b3037ea8e7dcd6b2755b688e upstream. If an expander reports 'PHY VACANT' for a phy index prior to the one that generated a BCN libsas fails rediscovery. Since a vacant phy is defined as a valid phy index that will never have an attached device just continue the search. Signed-off-by: Thomas Jackson Signed-off-by: Dan Williams Signed-off-by: James Bottomley Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/libsas/sas_expander.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -1632,9 +1632,17 @@ static int sas_find_bcast_phy(struct dom int phy_change_count = 0; res = sas_get_phy_change_count(dev, i, &phy_change_count); - if (res) - goto out; - else if (phy_change_count != ex->ex_phy[i].phy_change_count) { + switch (res) { + case SMP_RESP_PHY_VACANT: + case SMP_RESP_NO_PHY: + continue; + case SMP_RESP_FUNC_ACC: + break; + default: + return res; + } + + if (phy_change_count != ex->ex_phy[i].phy_change_count) { if (update) ex->ex_phy[i].phy_change_count = phy_change_count; @@ -1642,8 +1650,7 @@ static int sas_find_bcast_phy(struct dom return 0; } } -out: - return res; + return 0; } static int sas_get_ex_change_count(struct domain_device *dev, int *ecc)