From 282dac698e338351d3b9fb9db2739fe07e1c2ef9 Mon Sep 17 00:00:00 2001
From: Krzysztof Oledzki <olel@ans.pl>
Date: Tue, 4 Mar 2008 14:56:23 -0800
Subject: [PATCH] SCSI: mpt fusion: don't oops if NumPhys==0

Don't oops if NumPhys==0, instead return -ENODEV.
This patch fixes http://bugzilla.kernel.org/show_bug.cgi?id=9909

Signed-off-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Acked-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/message/fusion/mptsas.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index e4c94f93de16..c8d3ffb425be 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -1699,6 +1699,11 @@ mptsas_sas_expander_pg0(MPT_ADAPTER *ioc, struct mptsas_portinfo *port_info,
 	if (error)
 		goto out_free_consistent;
 
+	if (!buffer->NumPhys) {
+		error = -ENODEV;
+		goto out_free_consistent;
+	}
+
 	/* save config data */
 	port_info->num_phys = buffer->NumPhys;
 	port_info->phy_info = kcalloc(port_info->num_phys,
-- 
2.39.5