bnx2x: IGU parse error cause probe failure

If IGU parse error is encountered during the probing process, the error
propagates and the probe gracefully fails (until now, such errors were ignored,
later causing mischief).

Signed-off-by: Barak Witkowski <barak@broadcom.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -9974,7 +9974,7 @@ static void __devinit bnx2x_get_common_hwinfo(struct bnx2x *bp)
 #define IGU_FID(val)	GET_FIELD((val), IGU_REG_MAPPING_MEMORY_FID)
 #define IGU_VEC(val)	GET_FIELD((val), IGU_REG_MAPPING_MEMORY_VECTOR)
 
-static void __devinit bnx2x_get_igu_cam_info(struct bnx2x *bp)
+static int __devinit bnx2x_get_igu_cam_info(struct bnx2x *bp)
 {
 	int pfid = BP_FUNC(bp);
 	int igu_sb_id;
@@ -9991,7 +9991,7 @@ static void __devinit bnx2x_get_igu_cam_info(struct bnx2x *bp)
 		bp->igu_dsb_id =  E1HVN_MAX * FP_SB_MAX_E1x +
 			(CHIP_MODE_IS_4_PORT(bp) ? pfid : vn);
 
-		return;
+		return 0;
 	}
 
 	/* IGU in normal mode - read CAM */
@@ -10025,8 +10025,12 @@ static void __devinit bnx2x_get_igu_cam_info(struct bnx2x *bp)
 	bp->igu_sb_cnt = min_t(int, bp->igu_sb_cnt, igu_sb_cnt);
 #endif
 
-	if (igu_sb_cnt == 0)
+	if (igu_sb_cnt == 0) {
 		BNX2X_ERR("CAM configuration error\n");
+		return -EINVAL;
+	}
+
+	return 0;
 }
 
 static void __devinit bnx2x_link_settings_supported(struct bnx2x *bp,
@@ -10706,6 +10710,8 @@ static int __devinit bnx2x_get_hwinfo(struct bnx2x *bp)
 			if (REG_RD(bp, IGU_REG_RESET_MEMORIES)) {
 				dev_err(&bp->pdev->dev,
 					"FORCING Normal Mode failed!!!\n");
+				bnx2x_release_hw_lock(bp,
+						      HW_LOCK_RESOURCE_RESET);
 				return -EPERM;
 			}
 		}
@@ -10716,9 +10722,10 @@ static int __devinit bnx2x_get_hwinfo(struct bnx2x *bp)
 		} else
 			BNX2X_DEV_INFO("IGU Normal Mode\n");
 
-		bnx2x_get_igu_cam_info(bp);
-
+		rc = bnx2x_get_igu_cam_info(bp);
 		bnx2x_release_hw_lock(bp, HW_LOCK_RESOURCE_RESET);
+		if (rc)
+			return rc;
 	}
 
 	/*