[SCSI] mpt fusion: don't oops if NumPhys==0
Krzysztof Oledzki [Tue, 4 Mar 2008 22:56:23 +0000 (14:56 -0800)]
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>

drivers/message/fusion/mptsas.c

index f77b329..78734e2 100644 (file)
@@ -1701,6 +1701,11 @@ 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,