net: mscc: ocelot: calculate vcap offsets correctly for full and quarter entries

When calculating the offsets for the current entry within the row and
placing them inside struct vcap_data, the function assumes half key
entry (2 keys per row).

This patch modifies the vcap_data_offset_get() function to calculate a
correct data offset when the setting VCAP Type-Group of a key to
VCAP_TG_FULL or VCAP_TG_QUARTER.

This is needed because, for example, VCAP ES0 only supports full keys.

Also rename the 'count' variable to 'num_entries_per_row' to make the
function just one tiny bit easier to follow.
Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mscc/ocelot_vcap.c

@@ -177,8 +177,21 @@ static void vcap_data_offset_get(const struct vcap_props *vcap,
 	int i, col, offset, count, cnt, base;
 	u32 width = vcap->tg_width;
 
-	count = (data->tg_sw == VCAP_TG_HALF ? 2 : 4);
-	col = (ix % 2);
+	switch (data->tg_sw) {
+	case VCAP_TG_FULL:
+		count = 1;
+		break;
+	case VCAP_TG_HALF:
+		count = 2;
+		break;
+	case VCAP_TG_QUARTER:
+		count = 4;
+		break;
+	default:
+		return;
+	}
+
+	col = (ix % count);
 	cnt = (vcap->sw_count / count);
 	base = (vcap->sw_count - col * cnt - cnt);
 	data->tg_value = 0;