drivers/message/fusion/mptsas.c: inconsequent NULL checking

The Coverity checker spotted the following inconsequent NULL checking in drivers/message/fusion/mptsas.c:

<-- snip -->

...
static void
mptsas_delete_expander_phys(MPT_ADAPTER *ioc)
{
...

                if (port_info->phy_info &&
                    (!(port_info->phy_info[0].identify.device_info &
                    MPI_SAS_DEVICE_INFO_SMP_TARGET)))
                        continue;

                if (mptsas_sas_expander_pg0(ioc, &buffer,
                     (MPI_SAS_EXPAND_PGAD_FORM_HANDLE <<
                     MPI_SAS_EXPAND_PGAD_FORM_SHIFT),
                     port_info->phy_info[0].handle)) {

...

<-- snip -->

port_info->phy_info is first checked but later dereferenced unconditionally.

cu
Adrian

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed