[patch 62/76] SCSI: mpt fusion: dont oops if NumPhys==0

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: Krzysztof Oledzki <olel@xxxxxx>

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@xxxxxx>
Acked-by: Eric Moore <Eric.Moore@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 drivers/message/fusion/mptsas.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -1699,6 +1699,11 @@ mptsas_sas_expander_pg0(MPT_ADAPTER *ioc
 	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,

-- 
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