bnx2x: Make BP_VF more robust

Prevent dereference of pointer in case it's NULL.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.h
index ca1055f..01bafa4 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.h
@@ -299,7 +299,8 @@ struct bnx2x_vfdb {
 #define BP_VFDB(bp)            ((bp)->vfdb)
        /* vf array */
        struct bnx2x_virtf      *vfs;
-#define BP_VF(bp, idx)         (&((bp)->vfdb->vfs[idx]))
+#define BP_VF(bp, idx)         ((BP_VFDB(bp) && (bp)->vfdb->vfs) ? \
+                                       &((bp)->vfdb->vfs[idx]) : NULL)
 #define bnx2x_vf(bp, idx, var) ((bp)->vfdb->vfs[idx].var)
 
        /* queue array - for all vfs */