qede: Simplify the usage of qede-flags.

The values represented by qede->flags is being used in mixed ways:
  1. As 'value' at some places e.g., QEDE_FLAGS_IS_VF usage
  2. As bit-mask(value) at some places e.g., QEDE_FLAGS_PTP_TX_IN_PRORGESS
     usage.
This implementation pose problems in future when we want to add more flag
values e.g., overlap of the values, overflow of 64-bit storage.

Updated the implementation to go with approach (2) for qede->flags.
Signed-off-by: Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qede/qede.h

@@ -168,6 +168,12 @@ struct qede_ptp;
 
 #define QEDE_RFS_MAX_FLTR	256
 
+enum qede_flags_bit {
+	QEDE_FLAGS_IS_VF = 0,
+	QEDE_FLAGS_PTP_TX_IN_PRORGESS,
+	QEDE_FLAGS_TX_TIMESTAMPING_EN
+};
+
 struct qede_dev {
 	struct qed_dev			*cdev;
 	struct net_device		*ndev;
@@ -177,10 +183,7 @@ struct qede_dev {
 	u8				dp_level;
 
 	unsigned long flags;
-#define QEDE_FLAG_IS_VF			BIT(0)
-#define IS_VF(edev)	(!!((edev)->flags & QEDE_FLAG_IS_VF))
-#define QEDE_TX_TIMESTAMPING_EN		BIT(1)
-#define QEDE_FLAGS_PTP_TX_IN_PRORGESS	BIT(2)
+#define IS_VF(edev)	(test_bit(QEDE_FLAGS_IS_VF, &(edev)->flags))
 
 	const struct qed_eth_ops	*ops;
 	struct qede_ptp			*ptp;

drivers/net/ethernet/qlogic/qede/qede_main.c

@@ -1086,7 +1086,7 @@ static int __qede_probe(struct pci_dev *pdev, u32 dp_module, u8 dp_level,
 	}
 
 	if (is_vf)
-		edev->flags |= QEDE_FLAG_IS_VF;
+		set_bit(QEDE_FLAGS_IS_VF, &edev->flags);
 
 	qede_init_ndev(edev);
 

drivers/net/ethernet/qlogic/qede/qede_ptp.c

@@ -223,12 +223,12 @@ static int qede_ptp_cfg_filters(struct qede_dev *edev)
 
 	switch (ptp->tx_type) {
 	case HWTSTAMP_TX_ON:
-		edev->flags |= QEDE_TX_TIMESTAMPING_EN;
+		set_bit(QEDE_FLAGS_TX_TIMESTAMPING_EN, &edev->flags);
 		tx_type = QED_PTP_HWTSTAMP_TX_ON;
 		break;
 
 	case HWTSTAMP_TX_OFF:
-		edev->flags &= ~QEDE_TX_TIMESTAMPING_EN;
+		clear_bit(QEDE_FLAGS_TX_TIMESTAMPING_EN, &edev->flags);
 		tx_type = QED_PTP_HWTSTAMP_TX_OFF;
 		break;
 
@@ -518,7 +518,7 @@ void qede_ptp_tx_ts(struct qede_dev *edev, struct sk_buff *skb)
 	if (test_and_set_bit_lock(QEDE_FLAGS_PTP_TX_IN_PRORGESS, &edev->flags))
 		return;
 
-	if (unlikely(!(edev->flags & QEDE_TX_TIMESTAMPING_EN))) {
+	if (unlikely(!test_bit(QEDE_FLAGS_TX_TIMESTAMPING_EN, &edev->flags))) {
 		DP_NOTICE(edev,
 			  "Tx timestamping was not enabled, this packet will not be timestamped\n");
 	} else if (unlikely(ptp->tx_skb)) {