bnx2x: Prevent false warning for lack of FC NPIV

Not all adapters have FC-NPIV configured. If bnx2fc is used with such an adapter, driver would read irrelevant data from the the nvram and log "FC-NPIV table with bad length..." In system logs. Simply accept that reading '0' as the feature offset in nvram indicates the feature isn't there and return. Reported-by: Andrew Patterson <[email protected]> Signed-off-by: Yuval Mintz <[email protected]> Signed-off-by: David S. Miller <[email protected]>
kyagi · Mar 18, 2016 · 1e6bb1a · 1e6bb1a
1 parent 38c848c
commit 1e6bb1a
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -14885,6 +14885,10 @@ static int bnx2x_get_fc_npiv(struct net_device *dev,
 	}
 
 	offset = SHMEM2_RD(bp, fc_npiv_nvram_tbl_addr[BP_PORT(bp)]);
+	if (!offset) {
+		DP(BNX2X_MSG_MCP, "No FC-NPIV in NVRAM\n");
+		goto out;
+	}
 	DP(BNX2X_MSG_MCP, "Offset of FC-NPIV in NVRAM: %08x\n", offset);
 
 	/* Read the table contents from nvram */