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>

diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index e4c94f93de16a98462518419c923bb24f24d9414..c8d3ffb425be5a4ae16af1878add3108d2db3b5e 100644 (file)
--- 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,