net: stmmac: replace the int_snapshot_en field with a flag

Drop the boolean field of the plat_stmmacenet_data structure in favor of a
simple bitfield flag.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Link: https://lore.kernel.org/r/20230710090001.303225-11-brgl@bgdev.pl
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c

@@ -329,7 +329,7 @@ static int intel_crosststamp(ktime_t *device,
 	if (priv->plat->flags & STMMAC_FLAG_EXT_SNAPSHOT_EN)
 		return -EBUSY;
 
-	priv->plat->int_snapshot_en = 1;
+	priv->plat->flags |= STMMAC_FLAG_INT_SNAPSHOT_EN;
 
 	mutex_lock(&priv->aux_ts_lock);
 	/* Enable Internal snapshot trigger */
@@ -350,7 +350,7 @@ static int intel_crosststamp(ktime_t *device,
 		break;
 	default:
 		mutex_unlock(&priv->aux_ts_lock);
-		priv->plat->int_snapshot_en = 0;
+		priv->plat->flags &= ~STMMAC_FLAG_INT_SNAPSHOT_EN;
 		return -EINVAL;
 	}
 	writel(acr_value, ptpaddr + PTP_ACR);
@@ -376,7 +376,7 @@ static int intel_crosststamp(ktime_t *device,
 	if (!wait_event_interruptible_timeout(priv->tstamp_busy_wait,
 					      stmmac_cross_ts_isr(priv),
 					      HZ / 100)) {
-		priv->plat->int_snapshot_en = 0;
+		priv->plat->flags &= ~STMMAC_FLAG_INT_SNAPSHOT_EN;
 		return -ETIMEDOUT;
 	}
 
@@ -395,7 +395,7 @@ static int intel_crosststamp(ktime_t *device,
 	}
 
 	system->cycles *= intel_priv->crossts_adj;
-	priv->plat->int_snapshot_en = 0;
+	priv->plat->flags &= ~STMMAC_FLAG_INT_SNAPSHOT_EN;
 
 	return 0;
 }
@@ -609,7 +609,7 @@ static int intel_mgbe_common_data(struct pci_dev *pdev,
 	plat->ext_snapshot_num = AUX_SNAPSHOT0;
 
 	plat->crosststamp = intel_crosststamp;
-	plat->int_snapshot_en = 0;
+	plat->flags &= ~STMMAC_FLAG_INT_SNAPSHOT_EN;
 
 	/* Setup MSI vector offset specific to Intel mGbE controller */
 	plat->msi_mac_vec = 29;

drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c

@@ -180,7 +180,7 @@ static void timestamp_interrupt(struct stmmac_priv *priv)
 	u64 ptp_time;
 	int i;
 
-	if (priv->plat->int_snapshot_en) {
+	if (priv->plat->flags & STMMAC_FLAG_INT_SNAPSHOT_EN) {
 		wake_up(&priv->tstamp_busy_wait);
 		return;
 	}

include/linux/stmmac.h

@@ -213,6 +213,7 @@ struct dwmac4_addrs {
 #define STMMAC_FLAG_VLAN_FAIL_Q_EN		BIT(6)
 #define STMMAC_FLAG_MULTI_MSI_EN		BIT(7)
 #define STMMAC_FLAG_EXT_SNAPSHOT_EN		BIT(8)
+#define STMMAC_FLAG_INT_SNAPSHOT_EN		BIT(9)
 
 struct plat_stmmacenet_data {
 	int bus_id;
@@ -286,7 +287,6 @@ struct plat_stmmacenet_data {
 	struct pci_dev *pdev;
 	int int_snapshot_num;
 	int ext_snapshot_num;
-	bool int_snapshot_en;
 	int msi_mac_vec;
 	int msi_wol_vec;
 	int msi_lpi_vec;